The definition of understated is something done in a modest and not over-stated or overly flashy way.
A piece of jewelry that is not big or flashy is an example of something that would be described as understated.
restrained, subtle, modest, etc.: an understated color scheme
Not striking or obvious, as in style or ornamentation; restrained or subtle: “The waiting room is comfortable and understated” (Tony Schwartz).
- Simple past tense and past participle of understate.