adjective. liable to change.
adjective. (chemistry, physics, biology) readily undergoing change or breakdown.
1. Noun, singular or mass The descriptors "blunted," labile"" aria-label="Link to "labile""> "labile" and "flat affect" explain the expressions or lack of as they relate to the person's mood. 2. Adjective The labile moods and behaviors of adolescents stem from several causes, including brain growth and hormones.