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Definition of Foo
1. Noun. (computing) A metasyntactic variable used to represent an unspecified entity. If part of a series of such entities, it is often the first in the series, and followed immediately by bar. ¹
2. Noun. (slang) Also '''foo’'''. Representation of fool (foolish person). ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Foo
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