Holla (?), interj. [F. hola; ho ho + là there, fr. L. illac that way, there. Cf. Hollo.] Hollo.[1913 Webster]
Holla, v. i. [imp. & p. p. Hollaed (?); p. pr. & vb. n. Hollaing.] See Hollo, v. i.[1913 Webster]