Preposition:
* Direction: Indicates the direction of movement or destination.
* "I went to the store."
* "He threw the ball to her."
* Time: Indicates a point or period in time.
* "I'll be there to 5 pm."
* "From to now, things will be different."
* Relationship: Indicates a connection or relationship.
* "This is to inform you..."
* "The key to success is hard work."
Infinitive marker:
* Used before a verb to create an infinitive.
* "I want to eat."
* "He's going to leave."
Part of a phrasal verb:
* Combined with a verb to create a new meaning.
* "I have to go."
* "She wants to take part."
Other uses:
* Preposition: Can indicate a purpose or result.
* "She spoke to the point."
* "He's dedicated to his work."
* Interjection: Used to express surprise or agreement.
* "To, you were right!"
It's important to consider the context of the sentence to determine the exact meaning of "to".
For example, in the sentence "I went to the store," "to" is a preposition indicating direction. But in the sentence "I want to eat," "to" is used as an infinitive marker.
Do you have a specific sentence or context in mind where you'd like to know the meaning of "to"?