Verb (5-dan, く, intransitive)
1. to calm down; to compose oneself; to regain presence of mind; to relax
2. to calm down; to settle down; to die down; to become stable; to abate
3. to settle down (in a location, job, etc.); to settle in
4. to be settled (of an arrangement, conclusion, etc.); to be fixed; to have been reached
5. to harmonize with; to harmonise with; to match; to suit; to fit
6. to be unobtrusive; to be quiet; to be subdued
usu. before a noun as 落ち着いた