(military, historical) A signal sounded to instruct soldiers that it is time to water their horses.

(horticulture) Of a pot or planter: designed with a reservoir from which the soil can take up water without the need for manual watering of the plant.

(computing) A computer attack strategy, in which the victim is a particular group (organization, industry, or region), and the attacker guesses or observes which websites the group often uses and infects one or more of them with malware.

plural of watering hole attack

A herb in the mint family, Mentha aquatica.

plural of back-water

A recreational slide with water flowing down it to reduce friction, sometimes involving the participant sitting on a mat or raft and sometimes leading into a pool at the bottom.

plural of water slide

(hydrology) Water whose salinity falls between that of fresh water and that of seawater.

plural of water turbine