1Of a boat or its passengers: confined to or staying on the water; unable to reach the shore. Later also of a vehicle, mode of transport, etc.: that operates or is designed to be used (only) on the water; waterborne.

2Confined or detained by water, especially floodwater.

3Of clay, gravel, etc.: having the particles or grains bound by water; especially designating roads (typically of crushed stone or macadam) compacted by watering and rolling, without a bitumen or tar-based binder.