At‐tack″, n. [Cf. F. attaque.] 1. The act of attacking, or falling on with force or violence; an onset; an assault; — opposed to defense.
2. An assault upon one's feelings or reputation with unfriendly or bitter words.
3. A setting to work upon some task, etc.
4. An access of disease; a fit of sickness.
5. The beginning of corrosive, decomposing, or destructive action, by a chemical agent.