| 1. | beyond or more than what is usual, expected, or necessary; additional: an extra copy of a newspaper; an extra charge. |
| 2. | larger or better than what is usual: an extra binding. |
| 3. | something extra or additional: the little amenities and extras that make life pleasant. |
| 4. | an additional expense. |
| 5. | a special edition of a newspaper, other than a regular edition. |
| 6. | something of superior quality. |
| 7. | Movies, Television. a person hired by the day to play a minor part, as a member of a mob or crowd. |
| 8. | an additional worker. |
| 9. | Usually, extras. Cricket. a score or run not made from the bat, as a bye or a wide. |
| 10. | in excess of the usual or specified amount: an extra high price. |
| 11. | beyond the ordinary degree; unusually; uncommonly: done extra well; extra large. |
| a prefix meaning “outside,” “beyond,” freely used as an English formative: extrajudicial; extraterritorial; extra-atmospheric. |
ex·tra (ěk'strə) adj.
[Probably short for extraordinary.] |
extra- or extro-
pref.
Outside; beyond: extracellular.
EXTRA
Object-oriented, Pascal style, handles sets. "A Data Model and Query Language for EXODUS", M.J. Carey et al, SIGMOD 88 Conf Proc, pp.413- 423, ACM SIGMOD Record 17:3 (Sept 1988).