A verb can be described as transitive or intransitive based on whether it requires an object to express a complete thought or not. A transitive verb is one that only makes sense if it exerts its action on an object. An intransitive verb will make sense without one. Some verbs may be used both ways.
The word transitive often makes people think of transit, which leads to the mistaken assumption that the terms transitive and intransitive are just fancy ways of describing action and nonaction.