number

thirty

thirty

He is thirty years old.

He is thirty years old.

The ticket costs thirty pounds.

The ticket costs thirty dollars.

((+ noun)) used to express the number 30. There are thirty students in the class.

Synonyms: 30; Antonyms: (none)

From Old English 'þritig', from 'þri' (three) + '-tig' (a group of ten).

Think of it as 'three tens'. 3 x 10 = 30.

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