Meaning of down in English

Adjective

1. unhappy

I feel down today.

Adverb

1. from higher to lower; onto a surface

Put that box down on the floor.

2. from an upright position to a lying, kneeling or sitting position

The boy was sitting with his head down.

3. to a smaller quantity, size, value, intensity etc.

The price of gold is going down.

4. from an earlier time to a later time; to a later period

the history of Japan down to 1969

5. on paper

Please write down your address here.

Preposition

1. towards or in a lower place or position from a higher one

There is a park down the slope.

2. along a river, path, or river

Go down this street and turn right at the next corner.

down²

Noun

1. the soft feathers of a bird

Down is the inner layer of fluffy feathers that trap air to provide insulation from cold weather.