\Bil"bo\, n.; pl. {Bilboes}. 1. A rapier; a sword; so named from Bilbao, in Spain. --Shak. 2. pl. A long bar or bolt of iron with sliding shackles, and a lock at the end, to confine the feet of prisoners or offenders, esp. on board of ships. Methought I lay Worse than the mutines in the bilboes. --Shak.