Definition of "a."

a.

noun
1. Abbreviation of abbreviation.
2. Abbreviation of acceleration (in feet per second).
3. Abbreviation of accommodation.
4. Abbreviation of account.
5. Abbreviation of acre; acres; acreage.
6. Abbreviation of acronym.
7. Abbreviation of act; acting.
8. Abbreviation of activity.
9. Abbreviation of adjective.
10. Abbreviation of adjutant.
11. Abbreviation of adult.
12. Abbreviation of afternoon.
13. Abbreviation of age.
14. Abbreviation of altitude; altitude intercept.
15. Abbreviation of alto.
16. Abbreviation of amateur.
17. Abbreviation of ampere.
18. Abbreviation of annealing.
19. Abbreviation of anode.
20. Abbreviation of answer.
21. Abbreviation of anthracite.
22. Abbreviation of apprentice.
23. Abbreviation of arc.
24. Abbreviation of are, ares.
25. Abbreviation of area.
26. Abbreviation of argent.
27. Abbreviation of assist; assists.
28. Abbreviation of atmosphere.
29. Abbreviation of attendance.
30. Abbreviation of audit; auditor.
31. Abbreviation of aunt.
32. Abbreviation of aviation; aviator.
33. Abbreviation of axis.
adjective
1. Abbreviation of absent.
2. Abbreviation of absolute.
3. Abbreviation of abundant.
4. Abbreviation of accepted.
5. Abbreviation of accidental.
6. Abbreviation of acting.
7. Abbreviation of active.
  1. (linguistics, by extension) Abbreviation of transitive.
8. Abbreviation of aerial.
9. Abbreviation of alto.
10. Abbreviation of amateur.
11. Abbreviation of annus (“a year”).
12. Abbreviation of anonymous.
13. Abbreviation of ante (“before”).
14. Abbreviation of anterior.
15. Abbreviation of aqua.
16. Abbreviation of argent.
17. Abbreviation of artery; arterial blood.
18. Abbreviation of automatic.
19. Abbreviation of available.
adverb
1. Abbreviation of anno (“in the year”).
2. Abbreviation of annually.
preposition
1. Abbreviation of about.
2. Abbreviation of at.
3. Abbreviation of ante (“before”).
conjunction
1. Abbreviation of also.