within

Within is defined as inside, indoors or not beyond a certain limit.

(adverb)

An example of within is milk being inside the refrigerator.

See within in Webster's New World College Dictionary

adverb

Origin: ME withinne < OE withinnan < with, with + innan, within, into < in, in

in the inner part of; inside
not beyond in distance, time, degree, range, scope, etc.: within a mile, withinone's experience
inside the limits of: within the law

noun

the inside or the interior

See within in American Heritage Dictionary 4

adverb

preposition

In the inner part or parts of; inside: resentment seething within him.
a. Inside the limits or extent of in time or distance: arrived within two days; stayed within earshot; within ten miles of home.
b. Inside the fixed limits of; not beyond: lived within her income.
c. In the scope or sphere of: acted within the law; within the medical profession.
d. Inside a specified amount or degree: The team had pulled to within five points of winning.