- (initialism) . All Nippon Airways.
- (initialism) . American Nurses Association.
- (initialism) . anti-nuclear antibody.
- (initialism) . Afghan National Army.
- (initialism) . (UK) Animal Nursing Assistant.
- Noun. A collection of things associated with a person or place, especially a personal collection of anecdotes or conversations at table.
- Adverb. (''in prescriptions'') Of each; an equal quantity; as, wine and honey, ana (or contracted to aa), / ij. (that is, of wine and honey, each, two ounces).
- Noun. (Internet, slang) Anorexia (context, used especially by the pro-ana movement) .
- Adverb. In a direction analogous to up, but along the additional axis added by the fourth dimension.