(idiomatic) All hope is gone; there is no possibility of success; the period of good fortune is over.

any of many species of wildlife goose, such as the greylag goose or the Canada goose, whose wedge fly in a wedge or V form, or cuneiform, as opposed to the domesticated goose that would not fly.

(nautical) A position of sails in a fore-and-aft rigged sailboat, in which the mainsail is set to the leeward and the jib to the windward. This position may be used when running (almost) straight downwind.

A large goose, Branta canadensis.

A black and white species of bird within the family Anatidae from the northern hemisphere, Branta leucopsis.

The European white-fronted goose (Anser albifrons).

(informal) A silly person; a simpleton.

(military, typically derogatory) A style of march in which the legs advance in turn without bending the knee, whether as a low quick march or a rigorous high slow march for ceremonial occasions; the various drills associated with these marches.

(military, typically derogatory) To march with a goose-step.

To take steps to make something appear more attractive or compelling. / To boost or increase something's power (especially an engine).