noun

1. A group of twelve items.

   “Fractions would be a little easier if we counted by twelves.”

2. A twelve-bore gun.

3. A jury (normally composed of twelve persons).

numeral

1. The cardinal number occurring after eleven and before thirteen, represented in Arabic numerals as 12 and in Roman numerals as XII.

   “There are twelve months in a year.”

2. Law enforcement; the police

Synonyms: twelveteen