Lexical Definition

‎שׂוֹרָה‎ sôwrâh (so-raw') row ^H:N-F
from ‎שׂוּר‎ in the primitive sense of ‎סוּר‎

principal.

• properly, a ring, i.e. (by analogy) a row (adverbially)

1) row
1a) meaning uncertain

Brown-Driver-Briggs

‎שׂוֺרָה‎ Isa 28:5 probably dittograph for following ‎שְׂעֹרָה‎ (Koppe We Che and others; ᵐ5 ᵑ6 omitted); > ᵑ9 Ges Di and others in rows (adverb acc; but Late Hebrew ‎שׁוּרָה‎, Arabic , Lag^{GGN 1889, 298}; compare Vogelst^{Landwirthsch. 41} who favours ‎׳‎‎שׁ‎ in Isaiah. More plausible would be some grain, as ‎שורה‎ Zinjirli Inscription, Lzb³⁷⁴ Sachau^{Panammu 23}).

Brown-Driver-Briggs References