TWENTY

[determiner], [pronoun], [noun] - (the number) 20nineteen, twenty, twenty-onespace for twenty peoplea twenty-metre separation"How many minutes have we got till we have to leave?" "Oh, about twenty."Have you ever scored a treble twenty at darts?See also score (TWENTY).Some people have a big party for their twenty-first (birthday) (= when people in Western societies are traditionally said to become adults).The twenty-four-hour clock is the system of using 24 instead of 12 numbers to refer to each hour of the day.The video uses the twenty-four-hour clock - so you'll have to programme it for 21.00 hours instead of 9 p.m.If someone has twenty-twenty vision they have (informal) extremely good sight or (specialized) perfect sight as measured by a standard test.