ARROBA Meaning of ARROBA in English [ar.ro.ba] n [Sp & Pg, fr. Ar ar-rub', lit., the quarter] (1555) 1: an old Spanish unit of weight equal to about 25 pounds 2: an old Portuguese unit of weight equal to about 32 pounds Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012