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.
1 Make sure that the color of your shoes matches with your semi formal attire. Always take an extra pair of stockings if youâre wearing them.  Wear jewelry to glam up your semi formal outfit. Go for pretty (not fake looking) earrings or go for a necklace without or with small earrings.