'Libation' definitions:

Definition of 'libation'

From: WordNet
noun
(facetious) a serving of an alcoholic beverage
noun
A serving (of wine) poured out in honor of a deity
noun
The act of pouring a liquid offering (especially wine) as a religious ceremony

Definition of 'Libation'

From: GCIDE
  • Libation \Li*ba"tion\ (l[-i]*b[=a]"sh[u^]n), n. [L. libatio, fr. libare to take a little from anything, to taste, to pour out as an offering: cf. F. libation.] The act of pouring a liquid or liquor, usually wine, either on the ground or on a victim in sacrifice, in honor of some deity; also, the wine or liquid thus poured out. --Dryden. [1913 Webster]
  • A heathen sacrifice or libation to the earth. --Bacon. [1913 Webster]