Pinky/ˈpɪŋki/ Definition 1 of 4Pro Tip 1/2Common Injury The pinky is often injured due to its outward position. Take care to notice this context. After catching the football, I realized I sprained my pinky. Pro Tip 2/2Size Reference Sometimes used to describe other small things by comparison, not just fingers. Look at that pinky-sized kitten; it's so tiny!