The definition of hidden is concealed.
Not undesirably noticeable or blatant; inconspicuous.
Not considered; not taken into account
The definition of surreptitious is something that is done in secret or that is kept quiet.
Not directly evident; invisible.
Widely known or distinguished, as by reputation; famous:
Not attended or waited on
Operating in a hidden or confidential manner:
Find another word for unnoticed. In this page you can discover 46 synonyms, antonyms, idiomatic expressions, and related words for unnoticed, like: overlooked, inconspicuous, ignored, neglected, hidden, disregarded, unobtrusive, glossed-over, unconsidered, unscrutinized and unrecognized.