re ‧ flec ‧ tor /rɪˈflektə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ reflection , ↑ reflector ; verb : ↑ reflect ; adjective : ↑ reflective ]
1 . a small piece of plastic that is fastened to a bicycle or to a piece of clothing, so that it can be seen more easily at night. All bicycles sold in the UK must be fitted with reflectors.
2 . a surface that reflects light