A useful friend or associate.
A drug dealer.
To join an electrical or telephone line to a circuit or network.
To make a travel connection; to switch from one means of transport to another as part of the same trip.
To join (to another object): to attach, or to be intended to attach or capable of attaching, to another object.
To join: to attach, or to be intended to attach or capable of attaching, to each other.
To join (two other objects), or to join (one object) to (another object): to be a link between two objects, thereby attaching them to each other.
To join (two other objects), or to join (one object) to (another object): to take one object and attach it to another.
To arrive at an intended target; to land.
To associate; to establish a relation between.
To omit.
To desist; to cease.
To stop with a view to resuming at a later point.