within

American  

[with-in, with-] / wɪðˈɪn, wɪθ- /

adverb

1. in or into the interior or inner part; inside.

2. in or into a house, building, etc.; indoors.

   The fire was burning on the hearth within.

3. on, or as regards, the inside; internally.

4. inside an enclosed place, area, room, etc..

   He was startled by a cry from within.

5. in the mind, heart, or soul; inwardly.

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preposition

1. in or into the interior of or the parts or space enclosed by.

   within city walls.

2. inside of; in.

3. in the compass or limits of; not beyond.

   within view;

   to live within one's income.

4. at or to some point not beyond, as in length or distance; not farther than.

   within a radius of a mile.

5. at or to some amount or degree not exceeding.

   within two degrees of freezing.

6. in the course or period of, as in time.

   within one's memory;

   within three minutes.

7. inside of the limits fixed or required by; not transgressing.

   within the law.

8. in the field, sphere, or scope of.

   within the family;

   within one's power.

noun

1. the inside of a place, space, or building.

within British  

/ wɪˈðɪn /

preposition

1. in; inside; enclosed or encased by

2. before (a period of time) has elapsed

   within a week

3. not beyond the limits of; not differing by more than (a specified amount) from

   live within your means

   within seconds of the world record

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adverb

1. formal inside; internally

within Idioms  

More idioms and phrases containing within

• in (within) reason
• spitting distance, within
• wheels within wheels

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Etymology

Origin of within

First recorded before 1000; Middle English withinne (preposition and adverb), Old English withinnan (adverb), equivalent to with with- + innan “from within,” equivalent to in in + -an, suffix of motion

Explanation

Use the adverb within when you need to say that something is on the inside. If you find that the door to your brother’s room is locked from within, that means it’s locked from the inside and he really doesn't want you to enter. Within often refers to something on the inside of an object or structure — like those screams coming from within the haunted house. You can also use the word more figuratively to describe something that’s in your soul or mind — something that’s internal. For example, you might feel a fire within you as you start getting excited about playing in the big game.

Example Sentences

See Examples For:

within

The rapid demise of the fund’s turbocharged returns was also partly explained by the 13F filings that are required within 45 days of the end of the quarter.

From MarketWatch ● Aug. 17, 2026

Only eight percent of the Society’s members said they were very likely to adopt semiannual reporting within three years.

From The Wall Street Journal ● Aug. 17, 2026

The HBO Max series is based on DC comic book characters and is set within the same universe as films like “Superman” and “Supergirl” and the TV series “Peacemaker.”

From Los Angeles Times ● Aug. 17, 2026

Yet, within Ghana itself, the conversation around African complicity is far more nuanced, and for some traditional leaders, acknowledging the past is a vital prerequisite part of healing.

From BBC ● Aug. 16, 2026

The Fox sisters’ claim of spirit communIcation fit nicely within this popular trend of investigation as entertainment.

From "American Spirits" by Barb Rosenstock

Related Words

• in
• indoors
• inside