A physician whose practice is limited to a particular branch of medicine or surgery, especially one who is certified by a board of physicians, A person who devotes himself to a particular branch of a profession, science, or art; one who has a special knowledge of some particular subject_ thus, ophthalmologists, neurologists, or gynecologists are specialists in medicine, an expert who is devoted to one occupation or branch of learning, adjective_ UK Specialised

A written symbol or character representing a speech sound and being a component of an alphabet, A certified document granting rights to its bearer, A missive communication made by the use of letters, intransitive verb_ To earn a school letter, as for outstanding athletic achievement, To write or form letters, To write letters on

endorsed authoritatively as having met certain requirements; guranteed Opposite of uncertified, fit to be certified as insane (and treated accordingly), holding appropriate documentation and officially on record as qualified to perform a specified function or practice a specified skill,

The act of certifying, The state of being certified, a document attesting to the truth of certain stated facts

Simple past tense and past participle of guarantee, adjective_ secured by written agreement, certified