Definitions

1. preposition

in a lower position than; below; beneath

“The book is under the table.”

2. adverb

to a lower position; below; beneath

“She walked under the bridge.”

3. verb

to put (something) in a lower position; to place (something) beneath

“Please put the vase under the shelf.”

4. noun

the lower part of something; the part that is below

“The under part of the table is damaged.”