overly aware or conscious of oneself or one's actions, appearance, or state of being, especially seeming ill at ease due to feeling like one is being observed by others;
e.g. I felt self-conscious carrying such a large bag with me.
(adjective)
(philosophy) particularly aware or conscious of one's own existence, especially in terms of seeing oneself as a being with a consciousness;
e.g. We often assume that human beings are more self-conscious than any other animals.
(adjective)
extremely aware and deliberate, often pretentiously so, used to describe one's intentions or actions;
e.g. They made a self-conscious effort to include her in their conversation.