behind
US /bɪˈhaɪnd/
UK /bɪˈhaɪnd/

1.
at the back of (someone or something)
:
•
The dog was hiding behind the couch.
•
She stood behind her friend in the line.
2.
in support of (someone or something)
:
•
The whole team is behind the coach.
•
We are fully behind your decision.
1.
remaining after someone or something has left
:
•
He left his old life behind.
•
The car left a trail of dust behind.
2.