'Invader' definitions:
Definition of 'invader'
From: WordNet
noun
Someone who enters by force in order to conquer [syn: invader, encroacher]
Definition of 'Invader'
From: GCIDE
- Invader \In*vad"er\, n. One who invades; an assailant; an encroacher; an intruder. [1913 Webster]