The antonyms for the phrase "being in mid air" could refer to different states and conditions. First, the opposite of being suspended or levitating in the air could be standing or being grounded on the surface. Other antonyms could include falling, descending, dropping, or crashing, which imply losing the elevation and hitting the ground. Conversely, rising, ascending, or soaring could suggest moving upwards from a lower position. Another antonym could be being settled or stationary, meaning not moving or floating without any support. In general, the antonyms for "being in mid-air" mostly pertain to the opposite direction, condition, or movement.