within

[with-in, with-]

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.

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

/ 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

adverb

1. formal,  inside; internally

Word History and Origins

Origin of within¹

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

Idioms and Phrases

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

Example Sentences

In contrast, these new molecules perform the entire conversion process within a single substance.

Read more on Science Daily

"I watched a strong, capable man walk into hospital seeking help and, within just 19 weeks, he was gone," she said.

Read more on BBC

The next video shows Bald Mountain in the southern Sierra, within Sequoia National Forest.

Read more on Los Angeles Times

Postnatal depression is a common problem, affecting more than one in 10 women within a year of giving birth, according to the NHS.

Read more on BBC

Naomi initially found it funny but says "it now makes me sad as it shows the inherent bias within AI".

Read more on BBC

Related Words

• in 
• indoors 
• inside