acting or moving or capable of acting or moving quickly; "fast film"; "on the fast track in school"; "set a fast pace"; "a fast car"
at a rapid tempo; "the band played a fast fox trot"
(used of timepieces) indicating a time ahead of or later than the correct time; "my watch is fast"
securely fixed in place; "the post was still firm after being hit by the car"
resistant to destruction or fading; "fast colors"
(of surfaces) conducive to rapid speeds; "a fast road"; "grass courts are faster than clay"
quickly or rapidly (often used as a combining form); "how fast can he get here?"; "ran as fast as he could"; "needs medical help fast"; "fast-running rivers"; "fast-breaking news"; "fast-opening (or fast-closing) shutters"
firmly or tightly; "held fast to the rope"; "her foot was stuck fast"; "held tight"
abstain from eating; "Before the medical exam, you must fast"
abstain from certain foods, as for religious or medical reasons; "Catholics sometimes fast during Lent"
discovered or determined by scientific observation; "variation in the ascertained flux depends on a number of factors"; "the discovered behavior norms"; "discovered differences in achievement"; "no explanation for the observed phenomena"
a period of indeterminate length (usually short) marked by some action or condition; "he was here for a little while"; "I need to rest for a piece"; "a spell of good weather"; "a patch of bad weather"
having existence or being or actuality; "an attempt to refine the existent machinery to make it more efficient"; "much of the beluga caviar existing in the world is found in the Soviet Union and Iran"
the act of leaving secretly or without explanation
the event of passing out of sight
ceasing to exist; "he regretted the disappearance of Greek from school curricula"; "what was responsible for the disappearance of the rainforest?"; "the disappearance of resistance at very low temperatures"