an act of enlarging; increase, expansion, or amplification.

anything, as a photograph, that is an enlarged form of something.

anything that enlarges something else; addition

The new wing formed a considerable enlargement to the building.

noun

abridgment , compression , decrease , lessening , lowering , reduction , shrinkage

noun

aggrandizement , amplification , augmentation , blow up , elongation , extension , growth , spread , augment , boost , buildup , escalation , hike , jump , multiplication , proliferation , raise , rise , swell , upsurge , upswing , upturn , accretion , development , addition , ampliation , dilatation , dilation , ennoblement , expansion , expatiation , increase , magnification