Webster's English Dictionary

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tolerance

tol.er.ance \'ta:l(-*)-r*n(t)s\ n 1a: relative capacity to endure or adapt 
   physiologically to an unfavorable  environmental factor 1b: the maximum 
   amount of a pesticide residue that may lawfully remain on o r in food 2a: 
   sympathy or indulgence for beliefs or practices differing from or confl 
   ictng with one's own 2b: the act of allowing something : TOLERATION  3: the 
   allowable deviation from a standard; specif : the range of v ariation 
   permitted in maintaining a specified dimension in machining a piece