| A-O.K. |
(informal) perfectly fine; in excellent working order. |
| B.O. |
abbreviation of "body odor." |
| c.o.d. |
abbreviation of "collect on delivery," or "cash on delivery." Ordering an item c.o.d. means that payment is not required until the goods arrive. |
| D.O.A. |
abbreviation of "dead on arrival." |
| Jell-O |
(trademark) a sweetened, fruit-flavored gelatin dessert. |
| M.O. |
abbreviation of "modus operandi" (Latin); method of operating. |
| OK1 |
(informal) all right; satisfactory. [5 definitions] |
| OR2 |
abbreviation of "operating room." |
| P.O.1 |
abbreviation of "post office." |
| P.O.2 |
abbreviation of "parole officer," a court-appointed official who supervises persons, including convicts, who are on probation. |