slow 2 S3 W2 BrE AmE ( also slow down/up ) verb [intransitive and transitive]
to become slower or to make something slower:
Her breathing slowed and she fell asleep.
Ian slowed up as he approached the traffic lights.
slow down phrasal verb
1 . to become slower or to make something slower:
Growth in sales has slowed down.
slow somebody/something ↔ down
The ice on the road slowed us down.
2 . to become less active or busy than you usually are:
It is important to slow down, rest, and eat sensibly.