THIRTY


Meaning of THIRTY in English

■ cardinal number ( plural thirties ) the number equivalent to the product of three and ten; ten less than forty; 30. (Roman numeral: xxx or XXX .)

Derivatives

thirtieth ordinal number .

~fold adjective & adverb

Origin

OE thrītig (see three , -ty 2 ).

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.