| Term | Definition |
| pre | before, in advance |
| preapprove | to authorize or give permission in advance |
| precede | to come before something else in time, order or rank |
| predict | to say what will happen before it occurs |
| prefix | a syllable or word that comes before a root word to change its meaning |
| prejudge | to make a decision before you have all the facts |
| prepay | to pay for something before it needs to be paid in full |
| pretest | a test before the real test, usually given to see what is already known |
| prevent | to stop something before it occurs |
| preview | to look at or see something before something or someone else |
| precaution | a measure taken in advance to prevent harm |