from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Someone who oppugns; an opponent.
from the GNU version of the Collaborative International Dictionary of English
- n. One who opposes or attacks; that which opposes.
from The Century Dictionary and Cyclopedia
- n. One who attacks or assails by act or by argument; an opposer; an opponent.
From oppugn. (Wiktionary)