Lexical Definition

‎קַב‎ qab (kab) kab ^H:N-M
from ‎קָבַב‎

cab.

• a hollow, i.e. vessel used as a (dry) measure

1) a dry measure-cab, kab
1a) about 1.5 litres, 1/6 of a seah, or 1/18 of an ephah

Brown-Driver-Briggs

‎קַב‎ noun [masculine] kab (Late Hebrew id.; Syriac ; Talmud ‎קַבָא‎); — a measure of capacity, Biblical Hebrew only dry measure, ‎רֹבַע הַקַּב‎ 2Kgs 6:25 1/4 kab; on size of ‎קַב‎ = 4 ‎לֹג‎ = 1/6 ‎סְאָה‎ = 1/6 ‎הִין‎ = approximately 2 litres see Now^{Archaeology i. 202 f.} Benz^{Archaeology 182}.

Brown-Driver-Briggs References