Fences in is a phrase used to describe the action of enclosing a space, whether with a physical barrier or conceptually. There are several synonyms for this phrase, such as enclose, surround, corral, hem in, border, encircle, and barricade. To enclose means to surround something entirely, whereas to corral suggests a more confined space. Hem in also implies confinement, while surround and encircle suggest a more complete enclosure. Border and barricade both imply a physical barrier, although barricade suggests more of a temporary measure. No matter the synonym used, the action of fences in creates a sense of limitation and boundary, but can also provide a sense of security and structure.