אַרְבָּא I, (ארב to join, cmp. ארגז, תיבה) boat. B. Mets. 101ᵇ א׳ דחמרא a boat-load of wine; a. fr.—Gitt. 6ᵃ; Kidd. 72ᵃ א׳ תנייתא וכ׳ Ar. ed. Koh. (ed. תניינא) to the second boat of the (floating) bridge; cmp. Kidd. l. c. והאידנא וכ׳ ‘and now the Persians placed the bridge higher up’. [Oth. opin., v. אֲרַבְתָּא.]—Pl. אַרְבֵּי. B. Mets. 72ᵇ חיטי … וא׳ the wheat in granaries and ships.