Contact is the act of touching or communicating with someone or something else. The question increasingly isn't whether there is other life in the universe, but how on earth we will ever make contact with it.

"To make contact" (the noun) means to establish some form of communication, be it physical, verbal, or some other kind. To contact (the verb) means to establish that communication. If you're looking to contact Madonna, good luck. She's got people whose only job it is to prevent folks like you from making contact with her. Batteries have two contacts, one positive and one negative. They are where the battery makes contact with the thing to which it provides power.

Definitions of contact
  1. noun
    the act of touching physically
    “her fingers came in contact with the light switch”
    synonyms: physical contact
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    rub, wipe
    the act of rubbing or wiping
    fair ball
    (baseball) a ball struck with the bat so that it stays between the lines (the foul lines) that define the width of the playing field
    a glancing contact with the ball off the edge of the cricket bat
    laying on
    the act of contacting something with your hand
    the act of scuffing (scraping or dragging the feet)
    type of:
    touch, touching
    the act of putting two things together with no space between them
  2. noun
    the physical coming together of two or more things
    contact with the pier scraped paint from the hull”
    synonyms: impinging, striking
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    collision, hit
    (physics) a brief event in which two or more bodies come together
    engagement, interlocking, mesh, meshing
    contact by fitting together
    a light sharp contact (usually with something flexible)
    the striking of one body against another
    touch, touching
    the event of something coming in contact with the body
    blow, bump
    an impact (as from a collision)
    a forceful impact that makes a loud noise
    brush, light touch
    momentary contact
    a light touch
    type of:
    happening, natural event, occurrence, occurrent
    an event that happens
  3. noun
    the state or condition of touching or of being in immediate proximity
    “litmus paper turns red on contact with an acid”
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    (mathematics) a contact of two curves (or two surfaces) at which they have a common tangent
    the state of being tangent; having contact at a single point or along a line without crossing
    type of:
    connectedness, connection, link
    the state of being connected
  4. verb
    be in direct physical contact with; make contact
    “The wire must not contact the metal cover”
    “The surfaces contact at this point”
    synonyms: adjoin, meet, touch
    converge, meet
    be adjacent or come together
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    cover, spread over
    form a cover over
    adhere, cleave, cling, cohere, stick
    come or be in close contact with; stick or hold together and resist separation
    chafe, fray, fret, rub, scratch
    cause friction
    be attached; be in contact with
    fit closely or tightly
    abut, adjoin, border, butt, butt against, butt on, edge, march
    lie adjacent to another or share a boundary
    border, environ, ring, skirt, surround
    extend on all sides of simultaneously; encircle
    lean against, lean on, rest on
    rest on for support
    cover with liquid, usually water
    cover with blood
    mist, mist over
    become covered with mist
    cover with ice or snow or a glacier
    cover; be dispersed over
    grass, grass over
    cover with grass
    fit tightly, follow the contours of
    stick together
    clump together; as of bacteria, red blood cells, etc.
    cake, coat
    form a coat over
    drown, overwhelm, submerge
    cover completely or make imperceptible
    leech onto
    admire boundlessly and follow around
    decorate with or as if with a surrounding fringe
    gird, girdle
    put a girdle on or around
    surround with a cloister
    close in, enclose, inclose, shut in
    surround completely
    cover like a mantle
    hem in
    surround in a restrictive manner
    cloak, clothe, drape, robe
    cover as if with clothing
    neighbor, neighbour
    be located near or adjacent to
    surround with a cloister, as of a garden
    form a blanket-like cover (over)
    form a carpet-like cover (over)
    form an impenetrable cover over
    form a cover like a shroud
  5. noun
    a person who is in a position to give you special assistance
    “he used his business contacts to get an introduction to the governor”
    synonyms: middleman
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    type of:
    a person who represents others
  6. noun
    a channel for communication between groups
    synonyms: inter-group communication, liaison, link
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    type of:
    channel, communication channel, line
    (often plural) a means of communication or access
  7. noun
    close interaction
    “they kept in daily contact
    “they claimed that they had been in contact with extraterrestrial beings”
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    contact with something dangerous or undesirable
    eye contact
    contact that occurs when two people look directly at each other
    contact established between applicants and prospective employees
    type of:
    a mutual or reciprocal action; interacting
  8. noun
    a communicative interaction
    “the pilot made contact with the base”
    synonyms: touch
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    type of:
    communicating, communication
    the activity of communicating; the activity of conveying information
  9. verb
    be in or establish communication with
    “He never contacted his children after he emigrated to Australia”
    synonyms: get hold of, get through, reach
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    send a message from one computer to another to check whether it is reachable and active
    contact, usually in order to remind of something
    establish radio communications with
    type of:
    communicate, intercommunicate
    transmit thoughts or feelings
  10. noun
    a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
    synonyms: contact lens
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    type of:
    lens, lens system, lense
    a transparent optical device used to converge or diverge transmitted light and to form images
  11. noun
    (electronics) a junction where things (as two electrical conductors) touch or are in physical contact
    “they forget to solder the contacts
    synonyms: tangency
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    breaker point, distributor point, point
    a contact in the distributor; as the rotor turns its projecting arm contacts them and current flows to the spark plugs
    electrical contact
    contact that allows current to pass from one conductor to another
    p-n junction
    the junction between a p-type semiconductor and an n-type semiconductor
    short, short circuit
    accidental contact between two points in an electric circuit that have a potential difference
    sound bow
    contact (the part of a bell) against which the clapper strikes
    pole, terminal
    a contact on an electrical device (such as a battery) at which electric current enters or leaves
    the part (as of a wheel or shoe) that makes contact with the ground
    contact arm, wiper, wiper arm
    contact consisting of a conducting arm that rotates over a series of fixed contacts and comes to rest on an outlet
    the negatively charged terminal of a voltaic cell or storage battery that supplies current
    negative pole
    the terminal of a battery that is connected to the negative plate
    positive pole
    the terminal of a battery that is connected to the positive plate
    type of:
    conjunction, junction
    something that joins or connects
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