The term "being midair" refers to an object or a person suspended in the air without any support. To describe the opposite of being midair, there are several antonyms that can be used. The first antonym for midair is "grounded" which means being firmly situated on the ground. Another antonym for midair is "landed," which means an object or person has come to rest on the ground after being in the air. Another antonym for midair is "stationary," which means being in a fixed or stable position without any movement. Lastly, the antonym "grounded" and "anchored" means an object or person is anchored or fixed in a particular place.