vb, di*lat*ed  di*lat*ing vt  :  to enlarge, stretch, or cause to expand < his pupils with atropine>  vi  :  to become expanded or swollen <the pupil of the eye s and contracts in response to variation in the amount of light>  .
 
   
 
Similar sounding terms:  dahll·ite  de·lead  delt   delta 
 
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