1.  first-level university degree; degree given by a college or university to one who has completed a four-year course in the humanities; one who holds a bachelor's degree in the humanities. white metallic element (chemistry). bachelor of arts - from a university my brother has received a ba in economics from his university. baba (b?), v. i. [cf. of. baer to open the mouth, f. bayer.] to kiss. [obs.]