Dictionary definition · slow
verb
- lose velocity; move more slowly"The car decelerated"
- become slow or slower"Production slowed"
- cause to proceed more slowly"The illness slowed him down"
adjective
- not moving quickly; taking a comparatively long time"a slow walker"
- at a slow tempo"the band played a slow waltz"
- slow to learn or understand; lacking intellectual acuity"so dense he never understands anything I say to him"
- (used of timepieces) indicating a time earlier than the correct time"the clock is slow"
- so lacking in interest as to cause mental weariness"a boring evening with uninteresting people"
- (of business) not active or brisk"business is dull (or slow)"
adverb
- without speed (‘slow’ is sometimes used informally for ‘slowly’)"he spoke slowly"
- showing a time that is earlier than the actual time"the clock is almost an hour slow"
Source: Open English WordNet (CC BY 4.0).