SynonymDefinitionAntonym.com - English Synonym Dictionary

Lose velocity; move more slowly

Become slow or slower

Cause to proceed more slowly

Not moving quickly; taking a comparatively long time

At a slow tempo

(used of timepieces) indicating a time earlier than the correct time

Without speed (`slow' is sometimes used informally for `slowly')

Of timepieces

(of business) not active or brisk

Slow to learn or understand; lacking intellectual acuity

So lacking in interest as to cause mental weariness