ADJ [usu ADJ after v, oft v-link ADJ, ADJ n]未被看见的;未引起注意的;被忽视的 If something happens or passes unnoticed, it is not seen or noticed by anyone. 未被看见的;未引起注意的;被忽视的
I tried to slip up the stairs unnoticed.
我试图趁没人注意溜上楼去。
Her forty-fourth birthday had just passed, unnoticed by all but herself. [+ by]