fast

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fast[1,adjective] fast[2,intransitive verb] fast[3,noun] acid-fast drug-fast fast green fast-twitch

Main Entry: ¹fast
Pronunciation: fast
Function: adjective
1 : firmly fixed
2 a : having a rapid effect <a fast medicine> b : allowing for the rapid passage of a gas or liquid
3 : resistant to change (as from destructive action) -- used chiefly of organisms and in combination with the agent resisted <acid-fast bacteria>