n. Common misspelling of lens. (presumably a back-formation from the plural lenses)
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a transparent optical device used to converge or diverge transmitted light and to form images
Word Usage
"Clay, speaking about the crosshair Movement proble, If using a scope with adjustable objective lense, this can happen when the objective lense is adjusted wrong."