庭院，又称院子，是指房屋前后围起来的空间，可分为前院和后院，可作为园林、休闲、聚会的地方。亦有人会在庭院耕种，种植自用农作物，即果菜园。

A yard is an area of land immediately adjacent to a building or a group of buildings. It may be either enclosed or open. The word comes from the same linguistic root as the word garden and has many of the same meanings.

A number of derived words exist, usually tied to a particular usage or building type. Some may be archaic or in lesser use now. Examples of such words are: courtyard, barnyard, hopyard, graveyard, churchyard, brickyard, prison yard, railyard, junkyard and stableyard.