val ‧ u ‧ er /ˈvæljuə $ -ər/ BrE AmE noun [countable] British English
[ Word Family: noun : ↑ valuables , ↑ value , values, ↑ valuation , ↑ valuer , ↑ overvaluation ≠ UNDERVALUATION , ↑ devaluation ; adjective : ↑ valuable , ↑ invaluable , overvalued ≠ UNDERVALUED , ↑ valueless , ↑ valued ; verb : ↑ value , ↑ devalue , ↑ overvalue ≠ ↑ undervalue ]
someone whose job is to decide how much money something is worth