What does 21 stand for?

The list of 21 abbreviation meanings.

Stands For|3Abbreviated As|0Related|0
66
to be One
65
to One
54
2 Single
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APASmart Define. (2017). 21. Retrieved September 20, 2026, from http://smartdefine.org/21/abbreviations/f
ChicagoSmart Define. 2017. "21" http://smartdefine.org/21/abbreviations/f (accessed September 20, 2026).
HarvardSmart Define 2017, 21, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/21/abbreviations/f>.
MLASmart Define. "21" 4 December 2017. Web. 20 September 2026. <http://smartdefine.org/21/abbreviations/f>