Definition of: to

(t, unstressed tə) prep.
1. In a direction toward or terminating in: going to town.
2. Opposite, in contact with, or near: face to face; Hold me to your breast.
3. Intending or aiming at; having as an object or purpose: Come to my rescue.
4. Resulting in; having as a condition or effect: frozen to death; flattered to his ruin.
5. Belonging in connection or accompaniment with; denoting the relation of things made to go together or between which there is correspondence: the key to the barn; March to the music.
6. In honor of: Drink to me only with thine eyes.
7. In comparison, correspondence, or agreement with: often denoting ratio: 9 is to 3 as 21 to 7; four quarts to the gallon.
8. Until; approaching as a limit; denoting the end of a period of time, or a time not reached: to my dying day; five minutes to one.
9. For the utmost duration of; as far as: a miser to the end of his days.
10. In respect of; concerning: blind to her charms; a speech to the point.
11. In close application toward: Buckle down to work; Fall to dinner.
12. For; with regard for: The contest is open to everyone.
13. Noting an indirect or limiting object after verbs, adjectives, or nouns, and designating the recipient of the action: taking the place of the dative case in other languages: Give the ring to me; That fact is not apparent to me.
14. By: known to the world.
15. From the point of view of: It seems to me.
16. Dial. At or in (a place): He is not to home now.
17. Colloq. With: The land was planted to potatoes.
18. About; involved in: That's all there is to it. ♦ To also serves to indicate the infinitive, and is often used elliptically for it: You may come if you care to. See synonyms under AT, INTO.
—adverb
1. To or toward something.
2. In a direction, position, or state understood or implied; especially, shut or closed: Pull the door to.
3. Into a normal condition; into consciousness: She soon came to.
4. Naut. With head to the wind: said of a sailing vessel: to lie to.
5. Upon the matter at hand; into action or operation: They fell to with good will.
6. Nearby; at hand.
—to and fro In opposite or different directions; back and forth. [OE tō]