know

To know something means to have a piece of information or a certain understanding of something. If someone tells you their phone number and you remember it, you know.

There's a reason you can find the word know in the word knowledge — to know is to have knowledge about something, to be familiar with an idea, or to recognize someone. If you're "in the know," you have information that is only known to a select group of people. But be careful — to know someone in the Biblical sense means that you're having sexual relations with them.

Definitions of know
  1. verb
    be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
    “I know that the President lied to the people”
    “I want to know who is winning the game!”
    “I know it's time”
    synonyms: cognise, cognize
    see moresee less
    Antonyms:
    ignore
    be ignorant of or in the dark about
    types:
    keep track
    keep informed or fully aware
    agnise, agnize, realise, realize, recognise, recognize
    be fully aware or cognizant of
  2. verb
    be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt
    “I know that I left the key on the table”
    “Galileo knew that the earth moves around the sun”
    Synonyms:
    cognise, cognize
    be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
    see moresee less
    types:
    anticipate, foreknow, foresee, previse
    realize beforehand
  3. verb
    have fixed in the mind
    “I know Latin”
    “This student knows her irregular verbs”
    “Do you know the poem well enough to recite it?”
    see moresee less
    types:
    have down
    have (something) mastered
  4. verb
    have firsthand knowledge of states, situations, emotions, or sensations
    “I know the feeling!”
    “have you ever known hunger?”
    synonyms: experience, live
    see moresee less
    types:
    taste
    experience briefly
    live over, relive
    experience again, often in the imagination
    type of:
    experience, go through, see
    go or live through
  5. verb
    be able to distinguish, recognize as being different
    “The child knows right from wrong”
  6. verb
    know how to do or perform something
    “She knows how to knit”
    “Does your husband know how to cook?”
    see moresee less
    types:
    show 4 types...
    hide 4 types...
    be on the ball, be with it, know the score, know what's going on, know what's what
    be well-informed
    control, master
    have a firm understanding or knowledge of; be on top of
    get the hang, master
    be or become completely proficient or skilled in
    cinch
    get a grip on; get mastery of
  7. verb
    accept (someone) to be what is claimed or accept his power and authority
    synonyms: acknowledge, recognise, recognize
    see moresee less
    type of:
    accept
    consider or hold as true
  8. noun
    the fact of being aware of information that is known to few people
    “he is always in the know
    see moresee less
    type of:
    knowing
    a clear and certain mental apprehension
  9. verb
    be familiar or acquainted with a person or an object
    “She doesn't know this composer”
    “Do you know my sister?”
    “We know this movie”
    “I know him under a different name”
    “This flower is known as a Peruvian Lily”
  10. verb
    perceive as familiar
    “I know this voice!”
    see moresee less
    type of:
    call back, call up, recall, recollect, remember, retrieve, think
    recall knowledge from memory; have a recollection
  11. verb
    know the nature or character of
    “we all knew her as a big show-off”
    see moresee less
    type of:
    agnise, agnize, realise, realize, recognise, recognize
    be fully aware or cognizant of
  12. verb
    have sexual intercourse with
    synonyms: have intercourse, have sex, love, roll in the hay
    make out, neck
    kiss, embrace, or fondle with sexual passion
    see moresee less
    types:
    show 4 types...
    hide 4 types...
    have, take
    have sex with; archaic use
    fornicate
    have sex without being married
    swing
    engage freely in promiscuous sex, often with the husband or wife of one's friends
    bed-hop, bedhop, sleep around
    be sexually active with more than one partner
Word Family