Merriam-Webster Collegiate Dictionary - roam

 verb  Etymology: Middle English romen  Date: 14th century  intransitive verb  1. to go from place to place without purpose or direction ; wander  2. to travel purposefully unhindered through a wide area cattle ~ing in search of water  3. to use a cellular phone outside one's local calling area ~ing charges  transitive verb to range or wander over  Synonyms: see wander  • ~ noun  • ~er noun