Webster's Revised Unabridged Dictionary · 1913

Within

Within , preposition

[Old English withinne, withinnen, Anglo-Saxon wieinnan; wie with, against, toward + innan in, inwardly, within, from in in. See With, prep., In, prep.]

1.
In the inner or interior part of; inside of; not without; as, within doors.
O, unhappy youth! Come not within these doors; within this roof The enemy of all your graces lives. — Shakespeare
Till this be cured by religion, it is as impossible for a man to be happy -- that is, pleased and contented within himself -- as it is for a sick man to be at ease. — Tillotson
2.
In the limits or compass of; not further in length than; as, within five miles; not longer in time than; as, within an hour; not exceeding in quantity; as, expenses kept within one's income.
That he repair should again within a little while. — Chaucer
Within these five hours lived Lord Hastings, Untainted, unexamined, free, at liberty. — Shakespeare
3.
Hence, inside the limits, reach, or influence of; not going outside of; not beyond, overstepping, exceeding, or the like.
Both he and she are still within my power. — Dryden
Within himself The danger lies, yet lies within his power. — Milton
Were every action concluded within itself, and drew no consequence after it, we should, undoubtedly, never err in our choice of good. — Locke

Within , adverb

1.
In the inner part; inwardly; internally.
The wound festers within. — Carew
Ills from within thy reason must prevent. — Dryden
2.
In the house; in doors; as, the master is within.