Definitions

1. adverb

in that direction or to that place or thing

“She walked thereto, her footsteps echoing through the empty hallway.”

2. pronoun

used to refer to a previously mentioned place or thing

“The package was left on the table, and I walked thereto to pick it up.”

3. conjunction

used to connect two clauses or sentences

“I had to go to the store, thereto I decided to take a shortcut.”