twenˈtyfold noun, adjective and adverb

Twenty times as many or much

twenˈtyish adjective

About twenty

twenty-fiveˈ noun

A line on a hockey pitch (and formerly on a rugby pitch) twenty-five yards from the goal-line

twenty-fourˈ noun

1. A sheet folded into twenty-four leaves (forty-eight pages)
2. A form arranged for printing it

twenˈty-four-hourˈ adjective

1. Available at all times of day
2. (of an illness, etc) lasting a relatively short time

twenty-four-hour clock noun

A method of reckoning time by successive periods of twenty-four hours, continuing the sequence with 13 after 12 noon

twenty-fourˈmo noun

(written 24mo) a book made up of sheets folded in twenty-four leaves (forty-eight pages)

adjective

Having twenty-four leaves to the sheet

twenˈty-four-sevˈen (usu written 24–7) adverb (informal)

All the time, twenty-four hours a day and seven days a week

twenty-oneˈ noun (cards)

Pontoon

twenˈty-twenˈty adjective

1. (also 20/20) (of human vision) normal, also (informal) sharp, clear
2. (written twenty20) denoting a fast-paced form of cricket in which each side can bat for a maximum of 20 overs

twenty-twoˈ noun

A line on a rugby pitch twenty-two metres from the goal-line

and twenty (Shakespeare)

Supposed to be a mere intensive, as in good even and twenty or sweet and twenty (see under sweet)