Definitions
1.NounA bony swelling which develops in a horse's leg where the shank and splint bone meet, caused by inflammation of the cartilage connecting those bones; also, a similar swelling caused by inflammation of the hock bones.
2.NounA bony swelling which develops in a horse's leg where the shank and splint bone meet, caused by inflammation of the cartilage connecting those bones; also, a similar swelling caused by inflammation of the hock bones.
3.NounA disease of horses caused by this bony swelling (etymology 1, noun sense 1.1).
4.NounA similar disease causing a person's leg to be lame.
5.VerbTo cause (a horse or its leg) to have spavin (noun etymology 1, noun sense 1.2).
6.VerbTo impair or injure (someone or something).
7.NounThe stratum of earth underneath a coal deposit.