| Term | Definition |
| antecedents | ancestors; forebears; predecessors |
| antedate | come before in date; predate; precede |
| ante meridiem | before noon |
| post meridiem | after noon |
| anteroom | room placed before and forming an entrance to another room; antechamber; waiting room |
| postgraduate | having to do with study after graduation, especially after graduation from college |
| postmortem | thorough examination of a body after death; autopsy |
| postmortem | detailed discussion of an event just ended |
| postscript | note added to a letter after it has been written |
| postdate | assign a date after the true date |