keen-sighted keen·sigh·ted uncommon adjective 1. having very keen vision “quick-sighted as a cat” Synonymsargus-eyedhawk-eyedlynx-eyedquick-sightedsharp-eyedsharp-sighted Similarsighted 2. capable of seeing to a great distance Synonymseagle-eyedfarseeinglongsighted Similarfarsighted WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.