from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A violent attack.
- n. An overwhelming outpouring: an onslaught of third-class mail.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A fierce attack.
- n. A large quantity of people or things resembling an attack.
from the GNU version of the Collaborative International Dictionary of English
- n. An attack; an onset; esp., a furious or murderous attack or assault.
- n. A bloody fray or battle.
from The Century Dictionary and Cyclopedia
- n. Attack; onset; aggression; assault; an inroad; an incursion; a bloody attack.
- n. Synonyms Assault, etc. See onset.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the rapid and continuous delivery of linguistic communication (spoken or written)
- n. (military) an offensive against an enemy (using weapons)
- n. a sudden and severe onset of trouble
Alteration (influenced by obsolete slaughte, slaughter) of Dutch aanslag, a striking at, from Middle Dutch aenslach : aen-, on; + slach, a striking.(American Heritage® Dictionary of the English Language, Fourth Edition)
From anslaight (compare Dutch aanslag and German Anschlag), equivalent to on- + slaught. (Wiktionary)