Behind
Adverb, Preposition
UK
/bɪˈhaɪnd/
US
/bɪˈhaɪnd/
Definition
(prep) : At the back of something or later than something.
(adv) : In the back position or in a delayed state.
(adv) : In the back position or in a delayed state.
Example
"(prep) : The sun set behind the mountain."
"(adv) : She stayed behind after class to ask a question."
"(adv) : He fell behind in his studies because of illness."
Explanation
“Behind” is used to show that something is at the back of something else, or that something happens later or more slowly. As a preposition, it tells us the position of something (like “The dog is behind the door”). As an adverb, it is used without a following noun (like “He stayed behind”). It can also talk about time or progress — being late or slower than expected.