Definitions
1.AdjectiveAble to be submerged.
2.NounA small nonmilitary, nonnuclear submarine for exploration.
3.NounA retroactive term used for nonnuclear submarines; nuclear submarines are termed true submarines.
4.NounA term used primarily by some navies for nuclear submarines, termed true submersibles, because they cannot retroactively declare that their nonnuclear submarines should be called by a different name.
5.NounA very small baby submarine designed for specific localized missions, usually while tethered to a submarine or ship for life support and communications.
6.NounAn underwater vehicle with limited mobility, similar to a submarine, but less mobile.