Fifth/fɪfθ/ Definition 1 of 6Pro Tip 1/3Ordinal Use Used to describe the order of something in a series or list. It's her fifth birthday party. Pro Tip 2/3Relative Position Can indicate a position in a race or competition. He was upset about coming in fifth. Pro Tip 3/3Not Always Literal 'Fifth' may be used figuratively to suggest something's typical position. The company's product is a solid fifth in the industry.