1. keep under control; keep in check; "suppress a smile"; "Keep your temper"; "keep your cool"
(synonym) restrain, suppress, keep, hold back
(hypernym) prevent, keep
2. secure and keep for possible future use or application; "The landlord retained the security deposit"; "I reserve the right to disagree"
(synonym) retain, hold, hold back
(hypernym) keep, hold on
(hyponym) hold down
3. hold back; refuse to hand over or share; "The father is withholding the allowance until the son cleans his room"
(hypernym) deny, refuse
(hyponym) freeze, block, immobilize, immobilise