Meaning of L in English

L

( n. )

An extension at right angles to the length of a main building, giving to the ground plan a form resembling the letter L; sometimes less properly applied to a narrower, or lower, extension in the direction of the length of the main building; a wing.

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.