Tooth/tuːθ/ Definition 1 of 5Pro Tip 1/3Multiple Forms When talking about more than one tooth, we say 'teeth', not 'tooths'. She lost two teeth playing hockey. Pro Tip 2/3Use with Adjectives Combine 'tooth' with adjectives to describe their condition or type. He has a crooked tooth that makes him unique. Pro Tip 3/3Health Context Often used in contexts related to dental health and hygiene. Regular check-ups help prevent tooth decay.