to

adverb

1. Toward a closed, touching or engaging position.

- Please push the door to.

2. (nautical) Into the wind.

particle

1. A particle used for marking the following verb as an infinitive.

- I want to leave.

- He asked me what to do.

- I don’t know how to say it.

2. As above, with the verb implied.

- "Did you visit the museum?" "I wanted to, but it was closed."

- If he hasn't read it yet, he ought to.

preposition

1. Indicating destination: In the direction of, and arriving at.

- We are walking to the shop.

2. Used to indicate purpose.

- He devoted himself to education.

- They drank to his health.

3. Used after certain adjectives to indicate a relationship.

4. Indicating a necessity.

- That is something to do.

5. Used to indicate result of action.

- His face was beaten to a pulp.

6. Used after an adjective to indicate its application.

- similar to ..., relevant to ..., pertinent to ..., I was nice to him, he was cruel to her, I am used to walking.

7. (arithmetic) Used to indicate ratios; in informal use the ratios are not reduced to smallest terms.

- one to one = 1:1ten to one = 10:1.

8. (arithmetic) Used to indicate that the preceding term is to be raised to the power of the following value; indicates exponentiation.

- Three squared or three to the second power is nine.

- Three to the power of two is nine.

- Three to the second is nine.

9. Used to indicate the indirect object.

- I gave the book to him.

10. (time) Preceding.

- ten to ten = 9:50; We're going to leave at ten to (the hour).

11. (Canada, Britain, Newfoundland, West Midlands) at

- Stay where you're to and I'll come find you, b'y.