1. l - Noun
2. l - Adjective
3. l - Interjection
5. l - Adjective Satellite
As a numeral, L stands for fifty in the English, as in the Latin language.
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.
A short right-angled pipe fitting, used in connecting two pipes at right angles.
Source: Webster's dictionary