The Collaborative International Dictionary of English v.0.48:

Farrow \Far"row\ (f[a^]r"r[-o]), n. [AS. fearh a little pig; a
   akin to OHG. farh, farah, pig, dim. farheli little pig, G.
   fercel, D. varken pig, Lith. parszas OIr. orc, L. porcus, Gr.
   po`rkos. Cf. Pork.]
   A litter of pigs. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Farrow \Far"row\, v. t. & i. [imp. & p. p. Farrowed; p. pr. &
   vb. n. Farrowing.]
   To bring forth (young); -- said only of swine. --Tusser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Farrow \Far"row\, a. [Cf. Scot. ferry cow a cow that is not with
   calf, D. vaarkoe, vaars, heifer, G. f[aum]rse, AS. fearr
   bull, G. farre. Cf. Heifer.]
   Not producing young in a given season or year; -- said only
   of cows.
   [1913 Webster]

   Note: If a cow has had a calf, but fails in a subsequent
         year, she is said to be farrow, or to go farrow.
         [1913 Webster]

WordNet (r) 3.0 (2006):

farrow
    n 1: the production of a litter of pigs [syn: farrow,
         farrowing]
    v 1: give birth; "sows farrow" [syn: farrow, pig]