pressure

You feel pressure when something presses on you –- whether a physical force or a stressful situation. If you don't crack under the pressure of witnessing the accident, you will calmly apply pressure on the driver's wound until help arrives.

The pressure of a looming deadline might cause you to finally get to work on an assignment. Pressure can also be a verb, like when your friend pressures you to go rock climbing despite your fear of heights. The rocks you would rather not climb were formed long ago by extreme heat and pressure. While climbing, your friend's blood pressure may rise right along with yours when she sees how clumsy you are.

Definitions of pressure
  1. noun
    the act of pressing; the exertion of pressure
    “he used pressure to stop the bleeding”
    synonyms: press, pressing
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    impression
    the act of pressing one thing on or into the surface of another
    compressing, compression
    applying pressure
    squeeze, squeezing
    the act of gripping and pressing firmly
    condensation, condensing
    the act of increasing the density of something
    compaction, crunch, crush
    the act of crushing
    constriction
    the action or process of compressing
    type of:
    push, pushing
    the act of applying force in order to move something away
  2. noun
    the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit)
    “the compressed gas exerts an increased pressure
    synonyms: force per unit area, pressure level
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    blood pressure
    the pressure of the circulating blood against the walls of the blood vessels; results from the systole of the left ventricle of the heart; sometimes measured for a quick evaluation of a person's health
    gas pressure
    the pressure exerted by a gas
    head
    the pressure exerted by a fluid
    hydrostatic head
    the pressure at a given point in a liquid measured in terms of the vertical height of a column of the liquid needed to produce the same pressure
    IOP, intraocular pressure
    pressure exerted by the fluids inside the eyeball; regulated by resistance to the outward flow of aqueous humor
    oil pressure
    pressure that keeps oil on the moving parts of an internal-combustion engine
    osmotic pressure
    (physical chemistry) the pressure exerted by a solution necessary to prevent osmosis into that solution when it is separated from the pure solvent by a semipermeable membrane
    corpuscular-radiation pressure, radiation pressure
    the minute pressure exerted on a surface normal to the direction of propagation of a wave
    instantaneous sound pressure, sound pressure
    the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point
    suction
    a force over an area produced by a pressure difference
    vapor pressure, vapour pressure
    the pressure exerted by a vapor; often understood to mean saturated vapor pressure (the vapor pressure of a vapor in contact with its liquid form)
    acoustic radiation pressure
    (acoustics) the pressure exerted on a surface normal to the direction of propagation of a sound wave
    air pressure, atmospheric pressure
    the pressure exerted by the atmosphere
    systolic pressure
    the blood pressure (as measured by a sphygmomanometer) during the contraction of the left ventricle of the heart
    diastolic pressure
    the blood pressure (as measured by a sphygmomanometer) after the contraction of the heart while the chambers of the heart refill with blood
    arterial pressure
    the pressure of the circulating blood on the arteries
    venous pressure
    the pressure exerted on the walls of the veins by the circulating blood
    hypertonicity
    (of a solution) the extent to which a solution has a higher osmotic pressure than some other
    hypotonicity
    (of a solution) the extent to which a solution has a lower osmotic pressure than some other
    type of:
    physical phenomenon
    a natural phenomenon involving the physical properties of matter and energy
  3. noun
    the pressure exerted by the atmosphere
    synonyms: air pressure, atmospheric pressure
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    barometric pressure
    atmospheric pressure as indicated by a barometer
    compartment pressure
    the air pressure maintained in an air-tight compartment (as in an aircraft)
    overpressure
    a transient air pressure greater than the surrounding atmospheric pressure
    sea-level pressure
    the atmospheric pressure reduced by a formula to the pressure at sea level
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    gas pressure
    the pressure exerted by a gas
  4. noun
    the somatic sensation that results from applying force to an area of skin
    “the sensitivity of his skin to pressure and temperature was normal”
    synonyms: pressure sensation
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    somaesthesia, somatesthesia, somatic sensation, somesthesia
    the perception of tactual or proprioceptive or gut sensations
  5. verb
    cause to do through pressure or necessity, by physical, moral or intellectual means :"She forced him to take a job in the city"
    synonyms: coerce, force, hale, squeeze
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    turn up the heat, turn up the pressure
    apply great or increased pressure
    drive
    compel or force or urge relentlessly or exert coercive pressure on, or motivate strongly
    bludgeon
    overcome or coerce as if by using a heavy club
    steamroll, steamroller
    bring to a specified state by overwhelming force or pressure
    squeeze for
    squeeze someone for money, information, etc.
    dragoon, railroad, sandbag
    compel by coercion, threats, or crude means
    terrorise, terrorize
    coerce by violence or with threats
    bring oneself
    cause to undertake a certain action, usually used in the negative
    type of:
    compel, obligate, oblige
    force somebody to do something
  6. noun
    a force that compels
    “the public brought pressure to bear on the government”
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    force
    a powerful effect or influence
  7. noun
    an oppressive condition of physical or mental or social or economic distress
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    distress
    a state of adversity (danger or affliction or need)
  8. noun
    the state of demanding notice or attention
    synonyms: imperativeness, insistence, insistency, press
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    type of:
    urgency
    the state of being urgent; an earnest and insistent necessity
  9. verb
    exert pressure on someone through threats
    synonyms: blackjack, blackmail
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    type of:
    act upon, influence, work
    have and exert influence or effect
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