as ‧ ses ‧ sor /əˈsesə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ assessment , ↑ assessor ; verb : ↑ assess ]
1 . someone whose job is to calculate the value of something or the amount of tax someone should pay
2 . British English someone who decides how well someone has done in an examination SYN examiner
3 . someone who knows a lot about a subject or activity and who advises a judge or an official committee