Webster's Revised Unabridged Dictionary · 1913

Where

Where , adverb

[Old English wher, whar, Anglo-Saxon hw{not transcribed}r; akin to Dutch waar, Old Saxon hw{not transcribed}r, Old High German hwār, wār, , German wo, Icelandic and Swedish hvar, Danish hvor, Gothic hwar, and English who; compare Sanskrit karhi when. r182. See Who, and compare There.]

1.
At or in what place; hence, in what situation, position, or circumstances; -- used interrogatively.
God called unto Adam,... Where art thou? — Gen. iii. 9

See the Note under What, pron., 1.

2.
At or in which place; at the place in which; hence, in the case or instance in which; -- used relatively.
She visited that place where first she was so happy. — Sir P. Sidney
Where I thought the remnant of mine age Should have been cherished by her childlike duty. — Shakespeare
Where one on his side fights, thousands will fly. — Shakespeare
But where he rode one mile, the dwarf ran four. — Sir W. Scott
3.
To what or which place; hence, to what goal, result, or issue; whither; -- used interrogatively and relatively; as, where are you going?
But where does this tend? — Goldsmith
Lodged in sunny cleft, Where the gold breezes come not. — Bryant
The star... stood over where the young child was. — Matt. ii. 9
The Son of man hath not where to lay his head. — Matt. viii. 20
Within about twenty paces of where we were. — Goldsmith
Where did the minstrels come from? — Dickens

Where is often used pronominally with or without a preposition, in elliptical sentences for a place in which, the place in which, or what place.

Where is much used in composition with preposition, and then is equivalent to a pronoun. Compare Whereat, Whereby, Wherefore, Wherein, etc.

Collocations (1)
Where away (Nautical) , in what direction; as, where away is the land?

Where , conjunction

Whereas.
And flight and die is death destroying death; Where fearing dying pays death servile breath. — Shakespeare

Where , noun

Place; situation. [Obsolete or Colloquial]
Finding the nymph asleep in secret where. — Spenser