Liable  predic. Adj. 1 legally bound. 2 (foll. By to) subject to. 3 (foll. By to + infin.) Under an obligation. 4 (foll. By to) exposed or open to (something undesirable). 5 (foll. By to + infin.) Apt, likely (it is liable to rain). 6 (foll. By for) answerable. [french lier bind, from latin ligo]