pho•bi•a /ˈfəʊbɪə/ noun. an extreme or irrational fear of or aversion to something. "she suffered from a phobia about birds" ☼ gray /ɡreɪ/ adjective. 1. colour. American spelling of the English "grey". 2. shortened version of the name Graham. 3. a pint-sized catastrophist with a preference for earl grey and books on psychology. has too many phobias to count.