| pressure |  |  | 
| n. (phenomenon) | 1. force per unit area, pressure, pressure level | 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" | 
|  | ~ physical phenomenon | a natural phenomenon involving the physical properties of matter and energy. | 
|  | ~ 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.; "adult blood pressure is considered normal at 120/80 where the first number is the systolic pressure and the second is the diastolic pressure" | 
|  | ~ gas pressure | the pressure exerted by a gas. | 
|  | ~ head | the pressure exerted by a fluid.; "a head of steam" | 
|  | ~ 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. | 
|  | ~ intraocular pressure, iop | pressure exerted by the fluids inside the eyeball; regulated by resistance to the outward flow of aqueous humor.; "glaucoma can result from increased intraocular pressure" | 
|  | ~ 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). | 
| n. (attribute) | 2. pressure | a force that compels.; "the public brought pressure to bear on the government" | 
|  | ~ force | a powerful effect or influence.; "the force of his eloquence easily persuaded them" | 
| n. (act) | 3. press, pressing, pressure | the act of pressing; the exertion of pressure.; "he gave the button a press"; "he used pressure to stop the bleeding"; "at the pressing of a button" | 
|  | ~ push, pushing | the act of applying force in order to move something away.; "he gave the door a hard push"; "the pushing is good exercise" | 
|  | ~ impression | the act of pressing one thing on or into the surface of another.; "he watched the impression of the seal on the hot wax" | 
|  | ~ compressing, compression | applying pressure. | 
| n. (state) | 4. imperativeness, insistence, insistency, press, pressure | the state of demanding notice or attention.; "the insistence of their hunger"; "the press of business matters" | 
|  | ~ urgency | the state of being urgent; an earnest and insistent necessity. | 
| n. (cognition) | 5. pressure, pressure sensation | the somatic sensation that results from applying force to an area of skin.; "the sensitivity of his skin to pressure and temperature was normal" | 
|  | ~ somaesthesia, somatesthesia, somatic sensation, somesthesia | the perception of tactual or proprioceptive or gut sensations.; "he relied on somesthesia to warn him of pressure changes" | 
| n. (state) | 6. pressure | an oppressive condition of physical or mental or social or economic distress. | 
|  | ~ distress | a state of adversity (danger or affliction or need).; "a ship in distress"; "she was the classic maiden in distress" | 
| n. (phenomenon) | 7. air pressure, atmospheric pressure, pressure | the pressure exerted by the atmosphere. | 
|  | ~ gas pressure | the pressure exerted by a gas. | 
|  | ~ 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.; "the overpressure of the blast kills by lethal concussion" | 
|  | ~ sea-level pressure | the atmospheric pressure reduced by a formula to the pressure at sea level. | 
| v. (social) | 8. coerce, force, hale, pressure, squeeze | to cause to do through pressure or necessity, by physical, moral or intellectual means :.; "She forced him to take a job in the city"; "He squeezed her for information" | 
|  | ~ act, move | perform an action, or work out or perform (an action).; "think before you act"; "We must move quickly"; "The governor should act on the new energy bill"; "The nanny acted quickly by grabbing the toddler and covering him with a wet towel" | 
|  | ~ turn up the heat, turn up the pressure | apply great or increased pressure.; "The Democrats turned up the heat on their candidate to concede the election" | 
|  | ~ drive | to compel or force or urge relentlessly or exert coercive pressure on, or motivate strongly.; "She is driven by her passion" | 
|  | ~ bludgeon | overcome or coerce as if by using a heavy club.; "The teacher bludgeoned the students into learning the math formulas" | 
|  | ~ steamroll, steamroller | bring to a specified state by overwhelming force or pressure.; "The Senator steamrollered the bill to defeat" | 
|  | ~ squeeze for | squeeze someone for money, information, etc.. | 
|  | ~ dragoon, railroad, sandbag | compel by coercion, threats, or crude means.; "They sandbagged him to make dinner for everyone" | 
|  | ~ terrorise, terrorize | coerce by violence or with threats. | 
|  | ~ compel, obligate, oblige | force somebody to do something.; "We compel all students to fill out this form" | 
|  | ~ bring oneself | cause to undertake a certain action, usually used in the negative.; "He could not bring himself to call his parents" | 
| v. (social) | 9. blackjack, blackmail, pressure | exert pressure on someone through threats. | 
|  | ~ act upon, influence, work | have and exert influence or effect.; "The artist's work influenced the young painter"; "She worked on her friends to support the political candidate" | 
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