where

American Heritage® Dictionary of the English Language, Fourth Edition

1. adv. At or in what place: Where is the telephone?
2. adv. In what situation or position: Where would we be without your help?
3. adv. From what place or source: Where did you get this idea?
4. adv. To what place; toward what end: Where is this argument leading?
5. conj. At what or which place: She moved to the city, where jobs are available.
6. conj. In a place in which: He lives where the climate is mild.
7. conj. In any place or situation in which; wherever: Where there's smoke, there's fire.
8. conj. To a place in which: We should go where it is quieter.
9. conj. To a place or situation in which: They will go where they are happy.
10. n. The place or occasion: We know the when but not the where of it.
11. n. What place, source, or cause: Where are you from?

Century Dictionary and Cyclopedia

1. At or in what place? in what position, situation, or circumstances?
2. To which place? whither?
3. From what source? whence?
4. At or in which place, or the place in which; in which case, position, circumstances, etc.
5. To which place; whither; to a place such that.
6. Wherever.
7. Whereas.
8. Where, frequently having the force or function of a relative or other pronoun (which, what, etc.), is often used in composition with a following preposition: as, whereby, ‘by what,’ ‘by which’; wherewith, ‘with what,’ ‘with which.’ It was also formerly used after certain adverbs or adjectives in a general sense, as it still is in everywhere, somewhere (which see), Middle English widen wher (astray, at random), in forms corresponding to similar compounds of there (see there).
9. n. Whereabout; situation; place.
10. A contracted form of whether.

Wiktionary

1. conj. While on the contrary; although; whereas.
2. conj. At or in which place or situation.
3. conj. To which place or situation.
4. conj. Wherever.
5. conj. law In a position, case, etc., in which.
6. adv. At what place; to what place; what place.
7. adv. In what situation.
8. pro. The place in which.
9. n. The place in which something happens.

GNU Webster's 1913

1. adv. At or in what place; hence, in what situation, position, or circumstances; -- used interrogatively.
2. adv. At or in which place; at the place in which; hence, in the case or instance in which; -- used relatively.
3. adv. To what or which place; hence, to what goal, result, or issue; whither; -- used interrogatively and relatively; as, where are you going?
4. conj. Whereas.
5. n. Obs. or Colloq. Place; situation.