from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A logical operator that consists of a logical AND followed by a logical NOT and returns a false value only if both operands are true.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A binary operator composite of NOT AND; negation of AND function.
N(OT) + AND.(American Heritage® Dictionary of the English Language, Fourth Edition)