fast

Sense 1 noun

abstaining from food

Sense 2 verb

abstain from certain foods, as for religious or medical reasons

Catholics sometimes fast during Lent

Sense 3 adjective

acting or moving or capable of acting or moving quickly

fast film

Sense 4 adverb

quickly or rapidly (often used as a combining form)

how fast can he get here?

Sense 5 verb

abstain from eating

Before the medical exam, you must fast

Sense 6 adjective

(used of timepieces) indicating a time ahead of or later than the correct time

my watch is fast

Sense 7 adverb

firmly or closely

held fast to the rope

Sense 8 adjective

at a rapid tempo

the band played a fast fox trot

Sense 9 adjective

(of surfaces) conducive to rapid speeds

a fast road

Sense 10 adjective

resistant to destruction or fading

fast colors

Sense 11 adjective

unrestrained by convention or morality

Congreve draws a debauched aristocratic society

Sense 12 adjective

hurried and brief

paid a flying visit

Sense 13 adjective

securely fixed in place

the post was still firm after being hit by the car

Sense 14 adjective

(of a photographic lens or emulsion) causing a shortening of exposure time

a fast lens