Ostrich
Definition 1 of 2
Pro Tip 1/3
Speed reference
Ostriches are known for their speed, often alluded to when comparing fast runners. He's as quick as an ostrich on the racetrack.
Pro Tip 2/3
Flightlessness
Despite being a bird, ostriches cannot fly, which can be surprising. Despite its wings, the ostrich cannot take flight.
Pro Tip 3/3
Large size
Ostriches are the largest birds, used to describe something unusually big. My suitcase is like an ostrich, towering over the others.