(transitive) To knock (someone or something) down; to cause to come down; to fell. / (transitive) Specifically, to cause (something in the air) to fall to the ground; to bring down (with a missile etc.).

A negative aspect; a downer, a downside. / (dated) A grudge (on someone). / An act of swallowing an entire drink at once.

(especially southern England) A hill, especially a chalk hill; rolling grassland / (usually in the plural) A field, especially one used for horse racing.

Soft, fluffy immature feathers which grow on young birds. Used as insulating material in duvets, sleeping bags and jackets.

(transitive) To cover, ornament, line, or stuff with down.

A physician; a member of the medical profession; one who is trained and licensed to heal the sick or injured. The final examination and qualification may award a doctor degree in which case the post-nominal letters are D.O., DPM, M.D., DMD, DDS, in the US or MBBS in the UK.

(transitive) To act as a medical doctor to. / (intransitive, humorous) To act as a medical doctor. / (transitive) To make (someone) into an (academic) doctor; to confer a doctorate upon.

A portal of entry into a building, room, or vehicle, consisting of a rigid plane movable on a hinge. Doors are frequently made of wood or metal. May have a handle to help open and close, a latch to hold the door closed, and a lock that ensures the door cannot be opened without the key.

(transitive, cycling) To cause a collision by opening the door of a vehicle in front of an oncoming cyclist or pedestrian.

A place where ships are repaired or outfitted.