1. The activity of keeping something secret
   "His concealing of the truth eventually led to his downfall";
   - concealment, hiding

1. Covering or hiding
   "the concealing darkness"; "concealing curtains prevented discovery"

1. Prevent from being seen or discovered
   "conceal the money";
   - hide
    
2. Hold back; keep from being perceived by others
   "She conceals her anger well";
   - hold back, hold in, disguise

Type of: act, activity, hold, keep, maintain, move

Antonym: revealing, show

Encyclopedia: Conceal