from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. In a covert manner, secretly.
from the GNU version of the Collaborative International Dictionary of English
- adv. Secretly; in private; insidiously.
from The Century Dictionary and Cyclopedia
- Secretly; closely; in private; insidiously.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. in a covert manner
covert + -ly (Wiktionary)