IPA: /ˈpʊt.aʊt/
KK: /ˈpʊtˌaʊt/
In baseball, it refers to a situation where a player is declared out, either by a defensive player catching a ball or tagging a runner before they reach a base.
The pitcher made a great throw to first base, resulting in a putout of the runner.
Putout → The word is formed from "put" (from Old English "puttan", meaning to place or set) and "out" (meaning away from the inside). The term "putout" refers to the act of placing something away from a particular area or context.
Think of 'placing' something ('put') 'away' ('out') — that's why putout means to set something outside or remove it from a space.