What is a deep rough in golf?

Answer 1

There are several types of "cuts" in Golf, referring to the length of grass.

The fairway is the shortest grass (other than the green), which is followed by the "first cut" of rough, usually a boundary around the fairway.

The second cut of rough is next, and typically refers to the "standard" rough.

The "deep rough" can either mean a particularly long cut of "second cut" rough, or could mean thick, overgrown, un-mowed grass or weeds further from the fairway than the second cut.

However, there is no "official" definition.

Answer 2

Rough is the area beside the fairway where playing a ball is difficult.