What is the definition for to?

"To" is a versatile word in English, serving as a preposition, infinitive marker, and sometimes even an adverb. Here's a breakdown:

1. Preposition:

* Indicates direction or movement: "I went to the store."

* Indicates a destination: "The train is going to London."

* Indicates a point in time: "I'll be back to you tomorrow."

* Indicates a purpose or goal: "I went to the library to study."

2. Infinitive Marker:

* Introduces a verb in its base form: "I want to go."

* Used in various grammatical constructions: "It's time to eat."

3. Adverb (rare):

* Indicates a specific direction: "He walked to and fro." (meaning back and forth)

Examples:

* Preposition: "I went to the park."

* Infinitive Marker: "I like to read."

* Adverb: "He looked to and fro."

The specific meaning of "to" depends on the context of the sentence.