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.
Men. Formal Cocktail Attire. When you receive a formal invitation, there can be special requirements to the dress code such as âsemiformalâ or âblack tie optionalâ. Semi-formal means a dark suit and black tie optional is tuxedo or dark suit and a formal tie. Informal Cocktail Attire. A casual suit or well-ironed pants and a crisp buttoned shirt and tie will suffice as cocktail attire for guys on most occasions.