| 1. | any of certain small flies, esp. the biting gnats or punkies of the family Ceratopogonidae, the midges of the family Chironomidae, and the black flies of the family Simuliidae. |
| 2. | British. mosquito. |
| 3. | strain at a gnat and swallow a camel, to fuss about trifles while ignoring more serious matters. |

gnat (nāt)
n.
Any of various small, biting, two-winged flies, such as a biting midge or black fly.