ar ‧ rang ‧ er /əˈreɪndʒə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ arrangement , ↑ arranger ; verb : ↑ arrange ; adjective : arranged]
1 . someone who changes music that has been written by someone else so that it is suitable for a particular instrument or performance
2 . someone who arranges things for other people