Meaning of “inside” in the English Dictionary

"inside" in British English

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insidenoun

uk /ɪnˈsaɪd/ us /ɪnˈsaɪd/

B2 [ C usually singular ] the part, space, or side of something that is inside:

Did you clean the inside of the car?
The hotel looked shabby from the street, but it was fine on the inside.
the insides of people's houses
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[ C usually singular ] The inside of a part of the body such as the arm or leg is the part facing in towards the rest of the body:

She dabbed perfume on the inside of her wrist.
insides [ plural ] informal

a person's or animal's internal organs, especially the stomach or bowels:

The dead seal's insides were spread all over the snow.

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Idiom(s)

insideadverb, preposition, adjective

uk /ɪnˈsaɪd/ us /ɪnˈsaɪd/

A1 in or into a room, building, container, or something similar:

"Is Anna in the garden?" "No, she's inside (= in the house)."
What's inside the box?
Luckily, no one was inside the building when it collapsed.
figurative She couldn't cope with the grief she felt inside.
figurative Who can tell what goes on inside his head?
He put the documents carefully in his inside pocket (= pocket on the inside of a jacket or coat).
inside out

B2 If something is inside out, it has the usual inside part on the outside and the usual outside part on the inside:

She had her sweater on inside out.

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insidepreposition

uk /ˌɪnˈsaɪd/ us /ˌɪnˈsaɪd/ also inside of

insideadjective [ before noun ]

uk /ˈɪn.saɪd/ us /ˈɪn.saɪd/

insideadverb

uk /ɪnˈsaɪd/ us /ɪnˈsaɪd/ informal

(Definition of “inside” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"inside" in American English

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insidenoun

us /ɪnˈsɑɪd, ˈɪnˌsɑɪd/

inside noun (INNER PART)

the inner part, space, or side of (something):

[ U ] the inside of a car
[ U ] the inside of your wrist

infml Your insides are your stomach and other digestive organs.

Idiom(s)

insidepreposition, adjective, adverb [ not gradable ]

us /ɪnˈsɑɪd, ˈɪn·sɑɪd/

inside preposition, adjective, adverb [ not gradable ] (IN INNER PART)

in or into a room, building, container, or something similar:

What’s inside the big box?
I’ll work inside and you work outside.
People inside (= working for) the White House get an us versus them mentality.

If you get inside an idea or someone’s mind, you understand the idea or the person:

He tried to get inside her mind.
inside of

If you do something inside of a particular time, you do it using slightly less than that amout of time:

I should be back inside of two hours.

insideadjective [ not gradable ]

us /ˈɪnˌsɑɪd/

(of information) known only by people in a group, organization, or company; secret:

Maloney had inside information about the investigation.

(Definition of “inside” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"inside" in Business English

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insidepreposition

uk /ˌɪnˈsaɪd/ us

within or working for a company or organization:

They had been helped by someone working inside the firm.

also inside of if you do something or something happens inside (of) a particular time or limit, you do it or it happens in less than that amount of time:

The work should be finished inside a week.

insideadjective

uk /ˌɪnˈsaɪd/ us

obtained by someone in a group, organization, or company and therefore involving special or secret knowledge:

He was able to give me inside knowledge on the company's finances.

in or employed by a company or organization:

As expected, the inside candidate was appointed.
have the inside track

to have a special position within an organization, or a special relationship with a person, that gives you advantages or information that other people do not have :

She is said by analysts to have the inside track on how the industry works.

(Definition of “inside” from the Cambridge Business English Dictionary © Cambridge University Press)