Definition
A "gaolbird" is an older, somewhat archaic term for someone who is imprisoned or a habitual criminal. It's essentially the same as "jailbird," just with a different spelling of "jail" (gaol). Think of it as a historical equivalent, like using a vintage phrase. It suggests a life marked by frequent run-ins with the law. While less common now, you might encounter it in older literature or historical contexts. It's a colorful way to describe someone familiar with prison life.