inside or not further than an area or period of time, before the end of a particular period

within reach, within reason, within earshot

Formal and Informal Expressions of within

In different contexts, you can replace 'within' with suitable alternatives. In a more formal setting, 'inside, not beyond' is apt. In informal speech or writing, 'in, inside of' is a commonplace synonym.

within: Explore its Definition & Usage

within Definition

1inside or not further than an area or period of time
2before the end of a particular period

Using within: Examples

Take a moment to familiarize yourself with how "within" can be used in various situations through the following examples!

Example
The keys are somewhere within this room.
Example
You must complete the task within two hours.
Example
The package should arrive within the week.
Example
The store is located within the mall.

within Synonyms and Antonyms

Synonyms for within

inside
in
not beyond
not over

Antonyms for within

outside
beyond

Phrases with within

within reach
close enough to be easily grabbed or touched
Example
The remote control is within reach on the coffee table.
within reason
to a sensible or acceptable extent
Example
You can make any changes you want, but they must be within reason.
within earshot
close enough to hear something
Example
I could hear their conversation because I was within earshot.

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Summary: within in Brief

The word 'within' [wɪˈðɪn] is a preposition that refers to being inside or not further than an area or period of time. It can also mean before the end of a particular period. Examples include 'The keys are somewhere within this room,' and 'You must complete the task within two hours.' Phrases like 'within reach' and 'within reason' denote proximity and acceptability, respectively.