Merriam-Webster Collegiate Dictionary - left

 I. adjective  Etymology: Middle English, from Old English, weak; akin to Middle Low German lucht ~; from the ~ hand's being the weaker in most individuals  Date: 13th century  1.  a. of, relating to, situated on, or being the side of the body in which the heart is mostly located  b. done with the ~ hand a ~ hook to the jaw  c. located nearer to the ~ hand than to the right  d.  (1) located on the ~ of an observer facing in the same direction as the object specified stage ~  (2) located on the ~ when facing downstream the ~ bank of a river  2. often capitalized of, adhering to, or constituted by the ~ especially in politics  • ~ adverb  II. noun  Date: 13th century  1.  a. the ~ hand  b. the location or direction of the ~ side  c. the part on the ~ side  d. a turn to the ~ take a ~ at the intersection  2.  a. ~ field  b. a blow struck with the ~ fist  3. often capitalized  a. the part of a legislative chamber located to the ~ of the presiding officer  b. the members of a continental European legislative body occupying the ~ as a result of holding more radical political views than other members  4. often capitalized  a. those professing views usually characterized by desire to reform or overthrow the established order especially in politics and usually advocating change in the name of the greater freedom or well-being of the common man  b. a radical as distinguished from a conservative position  • ~most noun  III. past and past participle of leave