1. A reference to being cozy, comfortable, and secure: The bear was sleeping in the snug cave.

The hunters were able to find a snug cabin in the woods where they could feel safe and at ease.

2. Tight fitting or skin-tight: Athena told the salesperson that the shoes that were brought to her to try on were too snug and to please bring her a larger size.
3. Etymology: from Low German snugger, "compact, trim", as in the phrase a trim ship; that is, a watertight, seaworthy, well-run ship.