Mosquito/məˈskiːtəʊ/ Definition 1 of 1Pro Tip 1/3Disease Carrier Mosquitoes can spread diseases, so they're often mentioned in health contexts. Sleep under a mosquito net to avoid malaria. Pro Tip 2/3Annoying Insect Mosquito often implies irritation or annoyance because their bites are itchy. I couldn't relax with mosquitoes buzzing around. Pro Tip 3/3Outdoor Activities Used in contexts involving outdoor activities, especially in summer or near water. Bring mosquito repellent on your hiking trip.