slow in WordNet English dictionary

1. of timepieces
   "the clock is almost an hour slow"; "my watch is running behind"
   behind  slow  behind  slow 
   
2. without speed (`slow' is sometimes used informally for `slowly')
   "he spoke slowly"; "go easy here--the road is slippery"; "glaciers move tardily"; "please go slow so I can see the sights"
   slowly  slow  easy  tardily  slowly  slow  easy  tardily 
   

1. so lacking in interest as to cause mental weariness
   "a boring evening with uninteresting people"; "the deadening effect of some routine tasks"; "a dull play"; "his competent but dull performance"; "a ho-hum speaker who couldn't capture their attention"; "what an irksome task the writing of long letters is"- Edmund Burke; "tedious days on the train"; "the tiresome chirping of a cricket"- Mark Twain; "other people's dreams are dreadfully wearisome"
   boring  deadening  dull  ho-hum  irksome  slow  tedious  tiresome  wearisome 
   
2. slow to learn or understand; lacking intellectual acuity
   "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"
   dense  dim  dull  dumb  obtuse  slow 
   
3. (of business) not active or brisk
   "business is dull (or slow)"; "a sluggish market"
   dull  slow  sluggish 
   
4. not moving quickly; taking a comparatively long time
   "a slow walker"; "the slow lane of traffic"; "her steps were slow"; "he was slow in reacting to the news"; "slow but steady growth"
   slow 
   
5. at a slow tempo
   "the band played a slow waltz"
   slow 
   
6. (used of timepieces) indicating a time earlier than the correct time
   "the clock is slow"
   slow 
   

1. lose velocity; move more slowly
   "The car decelerated"
   decelerate  slow  slow down  slow up  retard 
   
2. become slow or slower
   "Production slowed"
   slow  slow down  slow up  slack  slacken 
   
3. cause to proceed more slowly
   "The illness slowed him down"
   slow  slow down  slow up