From Longman Dictionary of Contemporary Englishinsidein‧side1 /ɪnˈsaɪd/ ●●● S2 W2 adverb, preposition 1 containerIN/INSIDE in or into a container or other closed space so as to be completely covered or surrounded opp outside The jewels were locked away inside the safe. I sent the money inside an envelope addressed to Ann. Carl picked up the book and stuffed it inside his jacket. Her car was locked and the keys were inside.2 building/roomIN/INSIDE in or into a building or room opp outside It’s raining. We’ll have to go inside. She could hear voices inside, but no one came to the door. Mail was piled up just inside the doorway. The sound was coming from inside the house.inside ofAmerican English American English There were 20 people packed inside of her dorm room.3 country/areaTHERE in a country or area – used when you want to emphasize that something is happening there and not in other places opp outside Very little is known of events inside this mysterious country. The guerrillas were said to be operating from bases inside the war zone.4 organizationBBCSSO if someone is inside a group or organization, they are part of it opp outside women’s influence inside the party The information comes from sources inside the company. Discussions should involve local people both inside and outside the school.5 head/mindPRIVATE/PERSONAL if something happens inside you, or inside your head or mind, it is part of what you think and feel, especially when you do not express it You just don’t understand how I feel inside! Steve’s a strange guy – you never know what’s going on inside his head. Anger bubbled up deep inside her.inside ofAmerican English American English Something inside of me told me not to trust him. 6 bodyIN/INSIDE in your body She could feel the baby kicking inside her. You’ll feel better once you’ve got a good meal inside you (=after you have eaten something).7 time a) PERIOD OF TIMEin less than a particular amount of time A full report is expected inside three months.inside the hour/month etc (=before an hour, month etc has passed) We’ll be back inside the hour.inside ofespecially American English especially American English Our aim is to get the whole job finished inside of a week. b) less than a particular amount of time opp outside Jonson’s time of 9.3 seconds was just inside the world record.8 prison informalSCJPRISON in prison My boyfriend’s been inside for a year.
Examples from the Corpusinside• When we got to the window, we saw that there were already people inside.• I'm getting cold. Let's go inside.• I desperately needed some way to vent all the anger and frustration I felt inside.• I wish I knew what he was feeling inside.• The box has some letters inside.• Free inside! A monthly horoscope guide!• Kate tried to make jokes but inside she was furious.• Inside there are lots of handy hints to help you take better pictures.• These kids seem so aggressive, but inside they're terrified.• Gabby cringed a little inside when Peter showed up drunk.inside of• There were more than 20 people packed inside of her dorm room.inside the hour/month etc• I want you off my land inside the hour.