the GNU version of the Collaborative International Dictionary of English
n. One who by gradual steps enters on, and takes possession of, what is not his own.
The Century Dictionary and Cyclopedia
n. One who encroaches; one who lessens or limits anything, as a right or privilege, by narrowing its boundaries.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. someone who enters by force in order to conquer
Word Usage
"Catharine, on the other hand, considered him rather as an encroacher upon the grace which she had shown him than one whose delicacy rendered him deserving of such favour."