Webster's English Dictionary

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dimension

1. di.men.sion \d*-'men-ch*n, di--\ \-'mench-n*l, -'men-ch*n-*l\ 
   \-.men-ch*-'nal-*t-e-\ n [ME, fr. MF, fr. L dimension-, dimensio, fr. 
   dimensus, pp. of] dimetiri to measure out, fr. dis- + metiri to measure - 
   more at MEASURE 1a1: extension in one direction; specif : one of three or 
   four coor dinates determining a position in space or space and time 1a2: an 
   element represented in an equation by a symbol that functions analo gously 
   to symbols representing the three spatial dimensions and regarded as a 
   constituent of a geometric space 1b: magnitude of extension in one 
   direction or in all directions  1c: the range over which or the degree to 
   which something extends : SC OPE obs  2: bodily form or proportions  3: 
   wood or stone cut to pieces of specified size  - di.men.sion.al aj
2. dimension \-'mench-(*-)nin\ vt or di.men.sion.ing 1: to form to the 
   required dimensions  2: to indicate the dimensions on