Definition: Having no one else present; on one's own.
This sign is spatially inflected in agreement with the pronoun.
Q: I am wondering if there is a difference between the signs for something, always, and alone. "Alone" seems to have a smaller hand motion, but the signs for "something" and "always" seem identical. Are they? Or am I missing some sort of subtle difference?
Subtle differences, sometimes inflections, and contexts.
Read about homonyms in sign language.
Review 101 words. Refresher.