a. 1. Pertaining to, or having the form, nature, or habits of, a beast. [ 1913 Webster ]
Beastly divinities and droves of gods. Prior. [ 1913 Webster ]
2. Characterizing the nature of a beast; contrary to the nature and dignity of man; brutal; filthy. [ 1913 Webster ]
The beastly vice of drinking to excess. Swift. [ 1913 Webster ]
3. Abominable; as, beastly weather. [ Colloq. Eng. ] [ 1913 Webster ]
Syn. -- Bestial; brutish; irrational; sensual; degrading. [ 1913 Webster ]