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The Collaborative International Dictionary of English v.0.48 (gcide)

Expurgate \Ex"pur*gate\ ([e^]ks"p[u^]r*g[=a]t or
[e^]ks*p[^u]r"g[=a]t; 277), v. t. [imp. & p. p. {Expurgated}
([e^]ks`p[u^]r*g[=a]"t[e^]d); p. pr. & vb. n. {Expurgating}
([e^]ks`p[u^]r*g[=a]"t[i^]ng).] [L. expurgatus, p. p. of
expurgare to purge, purify; ex out, from purgare to
cleanse, purify, purge. See {Purge}, and cf. {Spurge}.]
To purify; to clear from anything noxious, offensive, or
erroneous; to cleanse; to purge; as, to expurgate a book.
[1913 Webster]