fast

US /fæst/
UK /fæst/
"fast" picture
1.

moving or capable of moving at high speed

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A cheetah is a very fast runner.
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The car was going too fast.
:
slow
2.

done or occurring in a short time

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We need to make a fast decision.
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The project had a very fast turnaround time.
:
slow
3.

firmly fixed or attached

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Make sure the rope is tied fast.
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The boat was held fast by the anchor.
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securefirmtightfixedanchored
1.

at high speed

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He drove fast down the highway.
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The river flows very fast here.
:
slowly
2.

firmly; securely

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Hold fast to the railing.
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The knot was tied fast.
:
firmlysecurelytightly
1.

abstain from all or some kinds of food or drink, especially as a religious observance

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Many people fast during Ramadan.
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She decided to fast for a day to cleanse her body.
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abstaingo without food
1.

an act or period of abstaining from all or some kinds of food or drink, especially as a religious observance

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The community observes a fast every year.
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Breaking the fast with a light meal is recommended.
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abstinencefasting
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fast foodfast-forwardfast fashionfast lanefast breakin the fast lanethick and fast