ante_meridiem
1. [ adjective ] before noon
Synonyms: am
Related terms: antemeridian
2. [ adverb ] before noon;
Synonyms: A.M.
Examples:

"let's meet at 11 A.M."

3. [ adverb ] before noon
Synonyms: a.m.
Examples:

"let's meet at 11 A.M."

Related terms: Latin
4. [ adjective ] before noon
Synonyms: a.m.
Related terms: antemeridian
5. [ noun ] (Latin: before midday) the time interval from midnight to midday
Synonyms: A.M. a.m. AM
Related terms: time_interval
Similar spelling:   antemeridian
  antemortem
  anathemize
  anathemise