From Longman Dictionary of Contemporary Englishon the insideon the insidesomeone who is on the inside is a member of a group or an organization Someone on the inside must have helped with the robbery. → inside
Examples from the Corpus
on the inside• Condensation: normal levels - a light film on the inside of the fly but no droplets.• Bells hung on the inside which occasionally Ruth, when in residence, would strike.• He grabbed his overcoat which hung on the inside of the door.• They played Twenty-one; the scores were kept on the inside of a Lyons Green Label tea packet.• Three narrow windows were locked on the inside, shades drawn.• He stupidly took off on the outside of a wave when some one else had already established priority on the inside.• Get rich quick schemes on the inside of matchbooks?• To those on the inside, the critique will probably seem unreasonable.on the insideon the insideBritish English if a car passes another car on the inside, it passes on the side that is away from the driver → insideExamples from the Corpus
on the inside• Condensation: normal levels - a light film on the inside of the fly but no droplets.• Bells hung on the inside which occasionally Ruth, when in residence, would strike.• He grabbed his overcoat which hung on the inside of the door.• They played Twenty-one; the scores were kept on the inside of a Lyons Green Label tea packet.• Three narrow windows were locked on the inside, shades drawn.• He stupidly took off on the outside of a wave when some one else had already established priority on the inside.• Get rich quick schemes on the inside of matchbooks?• To those on the inside, the critique will probably seem unreasonable. 