Definition of insecure. 1  1 : not confident or sure : uncertain feeling somewhat insecure of his reception. 2  2 : not adequately guarded or sustained : unsafe an insecure investment. 3  3 : not firmly fastened or fixed : shaky the hinge is loose and insecure.
For men, semi-formal attire means wearing a full suit, with vest optional. A tie, either bow or straight, should be worn, and the shirt should be a simple button down. Suit fabric choices are primarily wool gabardine or cashmere. However, a wool blend will do.
Formal/informal. Being formal or âinformalâ is a matter of tone. Having a formal tone is often required in academic writing. When your professors or instructors say you should make your writing sound more formal, it means that you should not use some words that are used in a casual written or spoken forms of language.