Merriam-Webster Collegiate Dictionary - even

 I. noun  Etymology: Middle English ~, eve, from Old English ?fen  Date: before 12th century archaic ~ing  II. adjective  Etymology: Middle English, from Old English efen; akin to Old High German eban ~  Date: before 12th century  1.  a. having a horizontal surface ; flat ~ ground  b. being without break, indentation, or irregularity ; smooth  c. being in the same plane or line  2.  a. free from variation ; uniform his disposition was ~  b. level 4  3.  a. equal, fair an ~ exchange  b.  (1) leaving nothing due on either side ; square we will not be ~ until you repay my visit  (2) fully r~ged  c. being in equilibrium ; balanced; specifically showing neither profit nor loss  d. obsolete candid  4.  a. being any of the integers (as -2, 0, and +2) that are exactly divisible by two  b. marked by an ~ number  c. being a mathematical function such that f(x) = f(-x) where the value remains unchanged if the sign of the independent variable is reversed  5. exact, precise an ~ dollar  6. as likely as not ; fifty-fifty an ~ chance of winning  Synonyms: see level, steady  • ~ly adverb  • ~ness noun  III. adverb  Etymology: Middle English, from Old English efne, from efen, adjective  Date: before 12th century  1.  a. exactly, precisely  b. to a degree that extends ; fully, quite faithful ~ unto death  c. at the very time raining ~ as the sun came out  2.  a. — used as an intensive to emphasize the identity or character of something he looked content, ~ happy forgot his car keys and ~ left the engine running  b. — used as an intensive to stress an extreme or highly unlikely condition or instance so simple ~ a child can do it  c. — used as an intensive to stress the comparative degree she did ~ better  d. — used as an intensive to indicate a small or minimum amount didn't ~ try  IV. verb  (~ed; ~ing)  Date: 13th century  transitive verb to make ~  intransitive verb to become ~  • ~er noun