1 A place in which to sleep on board ship, either in a bunk or, formerly in naval ships, a place in which to sling a hammock. A snug berth is a situation a seaman finds himself in when he is given an easy job or post on board ship or ashore.
2 The place in harbour in which a ship rides to its anchors or is secured alongside with berthing hawsers. In this sense it can also be used as a verb, i.e. to berth a ship.
3 A term used to indicate a clearance of danger, e.g. to give a wide berth to a rock, shoal, or any other hazard, to steer a ship well clear of it.