Twenty has 6 different meanings across 4 categories:
Noun · Adjective · Num · Proper Noun
a United States bill worth 20 dollars
"I accidentally handed over twenty instead of five when I tried to pay for my coffee."
A banknote with a denomination of 20.
"I found a crumpled twenty in my pocket that I completely forgot about until today's coffee run."
In plain English: Twenty is the number that comes right after nineteen and before twenty-one.
"The score was twenty to fifteen when the match ended."
Usage: Use this noun to refer specifically to a twenty-dollar bill or similar currency, distinguishing it from the number itself when discussing money in hand. Avoid using "a twenty" if you need to specify the exact amount owed rather than describing physical cash on your person.
The cardinal number 20, occurring after nineteen and before twenty-one.
"The clock struck twenty when we finally arrived at the station."
A hamlet in Bourne parish, South Kesteven district, Lincolnshire, England (OS grid ref TF1520).
"The local history group recently discovered an old stone marker from the village of Twenty during their survey of the Lincolnshire countryside."
The word "twenty" comes from Old English twēntiġ, which literally meant "two tens." It entered Middle English as a compound of "twain" (two) and "-ty" (a group of ten), reflecting the same numerical value it holds today.