adverb

1. Toward a closed, touching or engaging position.

   “Please push the door to.”

2. Into the wind.

Synonyms: closed, shut

preposition

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

   “We are walking to the shop.”

2. Used to indicate the target or recipient of an action.

   “He devoted himself to education.”

3. Used to indicate result of action.

   “His face was beaten to a pulp.”