[presh-er] 
noun, verb, -sured, -sur⋅ing.| 1. | the exertion of force upon a surface by an object, fluid, etc., in contact with it: the pressure of earth against a wall. |
| 2. | Physics. force per unit area. Symbol: P Compare stress (def. 6). |
| 3. | Meteorology. atmospheric pressure. |
| 4. | Electricity. electromotive force. |
| 5. | the state of being pressed or compressed. |
| 6. | harassment; oppression: the pressures of daily life. |
| 7. | a constraining or compelling force or influence: the social pressures of city life; financial pressure. |
| 8. | urgency, as of affairs or business: He works well under pressure. |
| 9. | Obsolete. that which is impressed. |
| 10. | to force (someone) toward a particular end; influence: They pressured him into accepting the contract. |
| 11. | pressurize. |
| the energy available for conversion from nonelectric to electric form, or vice versa, per unit of charge passing through the source of the energy; the potential difference between the terminals of a source of electrical energy: expressed in volts. Abbreviation: emf |
| pres·sure (prěsh'ər) n.
[Middle English, from Old French, from Latin pressūra, from pressus, past participle of premere, to press; see per-4 in Indo-European roots.] |
The force exerted on a given area. (See atmospheric pressure.)
Note: The most familiar measure of pressure is psi (pounds per square inch), used to rate pressure in automobile and bicycle tires.
electromotive force e·lec·tro·mo·tive force (ĭ-lěk'trō-mō'tĭv)
n.
Abbr. EMF
The energy per unit charge that is reversibly converted from chemical or other forms of energy into electrical energy in a battery.
pressure pres·sure (prěsh'ər)
n.
The act of pressing or condition of being pressed.
A stress or force acting in any direction against resistance.
Force applied uniformly over a surface, measured as force per unit of area.
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