from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. Occurring at the same time.
from The Century Dictionary and Cyclopedia
- In a simultaneous manner; at the same time; together in point of time.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. at the same instant
simultaneous + -ly (Wiktionary)