2. Noun. The action of the verb '''to spoof'''. ¹
3. Noun. (computing) A method of attacking a computer program, in which the program is modified so as to appear to be working normally when in reality it has been modified with the purpose to circumvent security mechanisms. ¹
4. Noun. (computing) Phishing. ¹
¹ Source: wiktionary.com
Definition of Spoofing
1. spoof [v] - See also: spoof