Merriam-Webster Collegiate Dictionary - high

 I. adjective  Etymology: Middle English, from Old English heah; akin to Old High German hoh ~, Lithuanian kaukaras hill  Date: before 12th century  1.  a. having large extension upward ; taller than average, usual, or expected a ~ wall  b. having a specified elevation ; tall six feet ~ — often used in combinations sky-~ waist-~  c. situated or passing above the normal level, surface, base of measurement, or elevation the ~ desert  2.  a.  (1) advanced toward the acme or culmination ~ summer  (2) advanced toward the most active or culminating period on the Riviera during ~ season  (3) constituting the late, most fully developed, or most creative stage or period ~ Gothic  (4) advanced in complexity, development, or elaboration the ~er primates including humans ~er mathematics  b. verging on lateness — usually used in the phrase ~ time  c. long past ; remote ~ antiquity  3. elevated in pitch a ~ note  4. relatively far from the equator ~ latitude  5. rich in quality ; luxurious ~ living  6. slightly tainted ~ game; also malodorous smelled rather ~  7. exalted in character ; noble ~ purposes  8. of greater degree, amount, cost, value, or content than average, usual, or expected ~ prices  9. of relatively great importance: as  a. foremost in rank, dignity, or standing ~ officials  b. serious, grave ~ crimes  c. observed with the utmost solemnity ~ religious observances  d. critical, climactic the ~ point of the novel  e. intellectually or artistically of the first order ~ culture  f. marked by sublime, heroic, or stirring events or subject matter ~ tragedy ~ adventure  10. forcible, strong ~ winds  11. stressing matters of doctrine and ceremony; specifically High Church  12.  a. filled with or expressing great joy or excitement ~ spirits  b. intoxicated; also excited or stupefied by or as if by a drug  13. articulated with some part of the tongue close to the palate a ~ vowel Synonyms:  ~, tall, lofty mean above the average in height. ~ implies marked extension upward and is applied chiefly to things which rise from a base or foundation or are placed at a conspicuous height above a lower level a ~ hill a ~ ceiling. tall applies to what grows or rises ~ by comparison with others of its kind and usually implies relative narrowness a tall thin man. lofty suggests great or imposing altitude lofty mountain peaks.  II. adverb  Date: before 12th century  1. at or to a ~ place, altitude, level, or degree climbed ~er passions ran ~  2. well, luxuriously — often used in the phrases ~ off the hog and ~ on the hog  III. noun  Date: 13th century  1. an elevated place or region: as  a. hill, knoll  b. the space overhead ; sky — usually used with on  c. heaven — usually used with on  2. a region of ~ barometric pressure — called also anticyclone  3.  a. a ~ point or level ; height sales reached a new ~  b. the transmission gear of a vehicle (as an automobile) giving the ~est speed of travel  4.  a. an excited, euphoric, or stupefied state produced by or as if by a drug  b. a state of elation or ~ spirits