<p><strong>Noun</strong></p><ul><li>any animal of the class Insecta, comprising small, air-breathing arthropods having the body divided into three parts (head, thorax, and abdomen), and having three pairs of legs and usually two pairs of wings.</li><li>any small arthropod, such as a spider, tick, or centipede, having a superficial, general similarity to the insects.</li><li>a contemptible or unimportant person.</li></ul><p><strong>Adjective</strong></p><ul><li>of, pertaining to, like, or used for or against insects: an insect bite; insect powder.</li></ul>