v. t. [ imp. & p. p. Befouled p. pr. & vb. n. Befouling. ] [ Cf. AS. bef&unr_;lan; pref. be- + f&unr_;lan to foul. See Foul, a. ] 1. To make foul; to soil. [ 1913 Webster ]
2. To entangle or run against so as to impede motion. [ 1913 Webster ]
adj. made disgustingly dirty. a building befouled with soot [ WordNet 1.5 ]