Definition of aspiration. 1  1a : a strong desire to achieve something high or great an aspiration to become famous âusually plural a young man with political/literary aspirationsb : an object of such desire An acting career is her aspiration.
Wheel and axle. The wheel and axle is one of six simple machines identified by Renaissance scientists drawing from Greek texts on technology. The wheel and axle consists of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other.
axle. 1  a shaft on which a wheel rotates. 2  one of two shafts extending from the body of a cart or carriage on either side of the animal that pulls it. 3  an axle that carries a wheel but without power to drive it. 4  the part of the axle contained by a bearing. 5  the axle of a self-propelled vehicle that provides the driving power.