Webster's English Dictionary

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exchange

1. ex.change \iks-'cha-nj, 'eks-.\ n [ME exchaunge, fr. MF eschange, fr. 
   eschangier to exchange, f]r. (assumed) VL excambiare, fr. L ex- + cambiare 
   to exchange - more at CHANGE 1: the act of giving or taking one thing in 
   return for another : TRADE  2a: the act of substituting one thing for 
   another  2b: reciprocal giving and receiving  3: something offered, given, 
   or received in an exchange; also : an  item or article reprinted from a 
   newspaper 4a: funds payable currently at a distant point either in a 
   foreign currency  or in domestic currency 4b1: interchange or conversion of 
   the money of two countries or of current  and uncurrent money with 
   allowance for difference in value 4b2: the amount of one currency that will 
   buy a given amount of another  4b3: the amount of the difference in value 
   between two currencies or betwee n values at two places 5: a place where 
   things or services are exchanged : as  5a: an organized market or center 
   for trading in securities or commodities  5b: a store or shop specializing 
   in merchandise usu. of a particular type  5c: a cooperative store or 
   society  5d: a central office in which telephone lines are connected to 
   permit commu nication
2. exchange \-*-b*l\ vt 1a: to part with, give, or transfer in 
   consideration of something received  as an equivalent 1b: to have replaced 
   by other merchandise  2: to part with for a substitute  3: BARTER, SWAP  1: 
   to pass or become received in exchange  2: to engage in an exchange  - 
   ex.change.able aj