fast
noun.
abstaining from food
Synonym: fasting
verb.
abstain from certain foods, as for religious or medical reasons
Catholics sometimes fast during Lent
verb.
abstain from eating
Before the medical exam, you must fast
adj.
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
adj.
(used of timepieces) indicating a time ahead of or later than the correct time
my watch is fast
adj.
at a rapid tempo
the band played a fast fox trot
adv.
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
adv.
firmly or closely
held fast to the rope|her foot was stuck fast|held tight
Synonym: tight
adj.
(of surfaces) conducive to rapid speeds
a fast road|grass courts are faster than clay
adj.
resistant to destruction or fading
fast colors
adj.
unrestrained by convention or morality
Congreve draws a debauched aristocratic society|deplorably dissipated and degraded|riotous living|fast women
adj.
hurried and brief
paid a flying visit|took a flying glance at the book|a quick inspection|a fast visit
Synonym: quick, flying
adj.
securely fixed in place
the post was still firm after being hit by the car
Synonym: firm, immobile
adj.
unwavering in devotion to friend or vow or cause
a firm ally|loyal supporters|the true-hearted soldier...of Tippecanoe|fast friends
adj.
(of a photographic lens or emulsion) causing a shortening of exposure time
a fast lens
Antonym: slow