from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. The sixteen teams participating in the regional semifinals of the NCAA Division I tournament, one of whom will become the national champion.
- proper n. The round of the NCAA Division I basketball tournament where all but 16 teams have been eliminated.
- proper n. An appearance in the Sweet Sixteen.
- proper n. A party for one's sixteenth birthday.
Sorry, no etymologies found.