adj like an insect; small; mean; ephemeral.
2. insect ·adj of or pertaining to an insect or insects.
3. insect ·noun any air-breathing arthropod, as a spider or scorpion.
4. insect ·noun fig.: any small, trivial, or contemptible person or thing.
5. insect ·noun one of the insecta; ·esp., one of the hexapoda. ·see insecta.
6. insect ·noun any small crustacean. in a wider sense, the word is often loosely applied to various small invertebrates.