WordWeb Online

1. So strong as to be irresistible
   "the temptation to despair may become overwhelming"; "an overwhelming majority"
   - overpowering
    
2. Very intense
   "overwhelming joy"
   - consuming

1. Overcome, as with emotions or perceptual stimuli
   - overpower, sweep over, whelm [archaic], overcome, overtake
    
2. Charge someone with too many tasks
   - deluge, flood out
    
3. Cover completely or make imperceptible
   - submerge, drown
    
4. Overcome by superior force
   - overpower, overmaster

See also: intense, irresistible, resistless

Type of: arouse, beat, beat out, burden, charge, cover, crush, elicit, enkindle, evoke, fire, kindle, provoke, raise, saddle, shell, spread over, trounce, vanquish