1 interior, centre, core, middle, heart; contents; lining, backing:
From the outside one could never guess what the inside looks like. Please paint the inside of the cabinet blue.
2 Usually, insides. bowels, entrails, viscera, gut(s), stomach, Colloq innards:
He has had trouble with his insides for years.
3 inside out. everted, reversed; backwards:
He is wearing his pullover inside out.
4 favoured, advantageous, favourable, advantaged, privileged, preferred, preferential, propitious, exclusive; internal, private, secret, confidential, privy, clandestine:
She has an inside track to the chairman. He claims to have inside information about the successful bidder
5 internal, interior; arranged, prearranged:
The police think it was an inside job.
6 fundamentally, basically, at bottom, by nature:
Despite her gruff exterior, inside she is quite sentimental.
7 in prison, in jail or Brit also gaol, imprisoned, incarcerated, Slang Brit in quod, US up the river:
He'll be inside for another five years.
8 within, US inside of:
Because of rain, the party was held inside the building.