Antonym: intrusion. Similar words: extrusive, intrusion, protrusion, extraversion, extroversion, extrude, intrusive, obtrusive. Meaning: [-uːʒn] 
n. 1. something that bulges out or is protuberant or projects from its surroundings 2. squeezing out by applying pressure.
n. 1. something that bulges out or is protuberant or projects from its surroundings 2. squeezing out by applying pressure. 
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More similar words: extrusive, intrusion, protrusion, extraversion, extroversion, extrude, intrusive, obtrusive, protrusive, unobtrusive, unobtrusively, business trust, extraction, extrication, extradition, extrapolation, fusion, elusion, allusion, effusion, delusion, infusion, illusion, inclusion, extension, diffusion, reclusion, collusion, seclusion, profusion.