From WordNet (r) 3.0 (2006) [wn]:
pub
n 1: tavern consisting of a building with a bar and public
rooms; often provides light meals [syn: public house,
pub, saloon, pothouse, gin mill, taphouse]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
pub \pub\ (p[u^]b), n. [Shortened from Public house.]
A retail business where alcoholic beverages are sold by the
drink; a bar; a tavern.
[PJC]
From The Free On-line Dictionary of Computing (8 July 2008) [foldoc]:
PUB
1. PUBlishing. A 1972 text-formatting language for TOPS-10,
with syntax based on SAIL. Influenced TeX and Scribe.
["PUB: The Document Compiler", Larry Tesler, Stanford AI Proj
Op Note, Sept 1972].
2. /pub, the top-level, publicly accessible directory on most
anonymous FTP archives. This is usually where the
interesting files are. See pubic directory.