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.
What is Meant by Semi-Formal Attire. The term semi formal dress code is perhaps the most confusing of all the dress codes that you may encounter. As it stands, semi formal is in and of itself an oxymoron so it comes as no surprise that many people are left befuddled when they receive an event invitation that calls for semi formal attire.