Definitions from Wiktionary ( )

▸ adverb:  (comparable) From a higher position to a lower one; downwards.
▸ adverb:  To or towards what is considered the bottom of something, irrespective of whether this is presently physically lower.
▸ adverb:  (comparable) At a lower or further place or position along a set path.
▸ adverb:  To the south (as south is at the bottom of typical maps).
▸ adverb:  Away from the city (regardless of direction).
▸ adverb:  At or towards any place that is visualised as 'down' by virtue of local features or local convention, or arbitrarily, irrespective of direction or elevation change.
▸ adverb:  Forward, straight ahead.
▸ adverb:  (rail transport) In the direction leading away from the principal terminus, away from milepost zero.
▸ adverb:  (UK, academia, dated) Away from Oxford or Cambridge.
▸ adverb:  To a subordinate or less prestigious position or rank.
▸ adverb:  (sports) Towards the opponent's side (in ball-sports).
▸ adverb:  So as to lessen quantity, level or intensity.
▸ adverb:  So as to reduce size, weight or volume.
▸ adverb:  From less to greater detail.
▸ adverb:  From a remoter or higher antiquity.
▸ adverb:  Into a state of non-operation.
▸ adverb:  So as to secure or compress something to the floor, ground, or other (usually horizontal) surface.
▸ adverb:  On paper (or in a durable record).
▸ adverb:  As a down payment.
▸ adverb:  (crosswords, in relation to a numbered clued word) In a downwards direction; vertically.
▸ adverb:  Used with verbs to indicate that the action of the verb was carried to some state of completion, permanence, or success rather than being of indefinite duration.
▸ adverb:  (sentence substitute, imperative) Get down.
▸ adjective:  Facing downwards.
▸ adjective:  At a lower level than before.
▸ adjective:  (informal) Sad, unhappy, depressed, feeling low.
▸ adjective:  Sick, wounded, or damaged:
▸ adjective:  (normally in the combination 'down with') Sick or ill.
▸ adjective:  (not comparable, military, law enforcement, slang, of a person) Wounded and unable to move normally, or killed.
▸ adjective:  (veterinary medicine, of a cow) Stranded in a recumbent position; unable to stand.
▸ adjective:  (not comparable, military, aviation, slang, of an aircraft) Mechanically failed, collided, shot down, or otherwise suddenly unable to fly.
▸ adjective:  (not comparable) Inoperable; out of order; out of service.
▸ adjective:  Having a lower score than an opponent.
▸ adjective:  (baseball, cricket, colloquial, following the noun modified) Out.
▸ adjective:  (colloquial, with "on") Negative about; hostile to.
▸ adjective:  (Canada, US, slang) Comfortable [with]; accepting [of]; okay [with].
▸ adjective:  (African-American Vernacular, slang) Accepted, respected, or loyally participating in the (thug) community.
▸ adjective:  Finished (of a task); defeated or dealt with (of an opponent or obstacle); elapsed (of time). Often coupled with to go (remaining).
▸ adjective:  Thoroughly practiced, learned or memorised; mastered. (Compare down pat.)
▸ adjective:  (obsolete) Downright; absolute; positive.
▸ adjective:  (of a tree, limb, etc) Fallen or felled.
▸ adjective:  (rail transport, of a train) Travelling in the direction leading away from the principal terminus, away from milepost zero.
▸ verb:  (transitive) To knock (someone or something) down; to cause to come down; to fell.
▸ verb:  (transitive) Specifically, to cause (something in the air) to fall to the ground; to bring down (with a missile etc.).
▸ verb:  (transitive) To lower; to put (something) down.
▸ verb:  (transitive, figurative) To defeat; to overpower.
▸ verb:  (transitive, colloquial) To disparage; to put down.
▸ verb:  (intransitive, rare or obsolete) To go or come down; to descend.
▸ verb:  (transitive, colloquial) To drink or swallow, especially without stopping before the vessel containing the liquid is empty.
▸ verb:  (transitive, American football, Canadian football) To render (the ball) dead, typically by touching the ground while in possession.
▸ verb:  (transitive, golf, pocket billiards) To sink (a ball) into a hole or pocket.
▸ noun:  A negative aspect; a downer, a downside.
▸ noun:  (dated) A grudge (on someone).
▸ noun:  An act of swallowing an entire drink at once.
▸ noun:  (American football) A single play, from the time the ball is snapped (the start) to the time the whistle is blown (the end) when the ball is down, or is downed.
▸ noun:  (crosswords) A clue whose solution runs vertically in the grid.
▸ noun:  A downstairs room of a two-story house.
▸ noun:  Down payment.
▸ noun:  The lightest quark with a charge number of −¹⁄₃.
▸ noun:  (especially Southern England, also Australia, often plural, often in place names) A hill; in England, especially a chalk hill.
▸ noun:  (usually in the plural) A field, especially one used for horse racing.
▸ noun:  (UK, chiefly in the plural) A tract of poor, sandy, undulating or hilly land near the sea, covered with fine turf which serves chiefly for the grazing of sheep.
▸ noun:  Soft, fluffy immature feathers which grow on young birds. Used as insulating material in duvets, sleeping bags and jackets.
▸ noun:  (botany) The pubescence of plants; the hairy crown or envelope of the seeds of certain plants, such as the thistle.
▸ noun:  The soft hair of the face when beginning to appear.
▸ noun:  That which is made of down, as a bed or pillow; that which affords ease and repose, like a bed of down.
▸ verb:  (transitive) To cover, ornament, line, or stuff with down.
▸ noun:  One of the six traditional counties of Northern Ireland, usually known as County Down.
▸ noun:  A surname.

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