Webster's English Dictionary

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inside

1. in.side \(')in-'si-d, 'in-.\ n 1: an inner side or surface  2a: an 
   interior or internal part : the part within  2b: inward nature, thoughts, 
   or feeling  2c: VISCERA, ENTRAILS - usu. used in pl.  3a: a position of 
   power or confidence  slang  3b: confidential information  - inside aj
2. inside pp 1a: in or into the interior of  1b: on the inner side of  2: 
   before the end of : WITHIN {~ an hour} 
3. inside av 1: on the inner side  2: in or into the interior