roam >> rəʊm
Definition: [verb] move about or travel aimlessly or unsystematically, especially over a wide area.
Example: tigers once roamed over most of Asia
Definition: [verb] use a mobile phone on another operator's network, typically while abroad.
Example: Orange now allows Pay As You Go mobile phone customers to roam in the US
Definition: [noun] an aimless walk.
Example: did you get to explore the city or have a roam around Bath?