■ cardinal number ( plural ~s or (with numeral or quantifying word) same)
1》 ( a/one ~ ) the number equivalent to the product of a hundred and ten; 1,000. (Roman numeral: m or M .)
2》 ( ~s ) informal an unspecified large number.
Derivatives
~fold adjective & adverb
~th ordinal number .
Origin
OE thūsend , of Gmc origin.