Merriam-Webster Collegiate Dictionary - freak

 I. noun  Etymology: origin unknown  Date: 1563  1.  a. a sudden and odd or seemingly pointless idea or turn of the mind  b. a seemingly capricious action or event  2. archaic a whimsical quality or disposition  3. one that is markedly unusual or abnormal: as  a. a person or animal having a physical oddity and appearing in a circus sideshow  b. slang  (1) a sexual deviate  (2) a person who uses an illicit drug  c. hippie  d. an atypical postage stamp usually caused by a unique defect in paper (as a crease) or a unique event in the manufacturing process (as a speck of dirt on the plate) that does not produce a constant or systematic effect  4.  a. an ardent enthusiast film ~s  b. a person who is obsessed with something a control ~  II. adjective  Date: circa 1887 having the character of a ~ a ~ accident  III. verb  Date: 1964  transitive verb  1. to make greatly distressed, astonished, or discomposed — often used with out the news ~ed them out  2. to put under the influence of a psychedelic drug — often used with out  intransitive verb  1. to withdraw from reality especially by taking drugs — often used with out  2. to experience nightmarish hallucinations as a result of taking drugs — often used with out  3.  a. to behave irrationally or unconventionally under the influence of drugs — often used with out  b. to react with extreme or irrational distress or discomposure — often used with out  • ~ed adjective  • ~ed-out adjective  IV. transitive verb  Etymology: perhaps from or akin to 1freckle  Date: 1637 to streak especially with color silver and mother-of-pearl ~ing the intense azure — Robert Bridges †1930