assessor UK /əˈsɛsə/US /əˈsɛsɚ/ noun6 •One who assesses a property for tax or insurance evaluation.On that day Karsfeld, the Princess Street jeweller, y'know, who acted as our jewellery assessor, forwards a proposal of the Hon. Mrs Straithwaite to insure a pearl necklace against theft. — 1914 •One who assesses a project for cost evaluation. •A civil servant entrusted with checking the veracity of data and criteria used by a taxpayer to complete a tax return. •A specialist who assists the court in determining a matter. •(UK) An official responsible for student welfare. •A member of an executive body in Italian local government. formsassessors