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slow up

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slow someone or something up

 and slow someone or something down

to cause someone or something to reduce speed. I'm in a hurry. Don't try to slow me down. Please slow up the train. There are sheep near the track.

See also: slow, up

slow up

to go slower; to reduce speed in order for someone or something to catch up. slow up a little! I can't keep up with you! Please slow up. I can't follow your lecture when you talk so fast.

See also: slow, up

slow up

Slacken or cause to slacken in speed, as in The train slowed up as it approached the curve, or Come on, you're slowing me up. [Late 1800s] Also see slow down, def. 1.

See also: slow, up

slow up

v.

1. To delay someone or something; retard someone or something: Bad weather slowed up the project. The accident on the freeway slowed us up.

2. To move, work, or happen at a slower rate: Traffic slows up where the two freeways converge.

See also: slow, up