Adjective

(en adjective)

That is no longer connected.

There's no use trying to make a call on the disconnected phone.

Feeling a lack of empathy or association with something.

I just feel so disconnected from people living on the other side of the world.

(mathematics, of a topological space) That can be partitioned into two nonempty subsets which are both open and closed.

Adjective

(er)

Unhappy because of feelings of loneliness.

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* {{quote-magazine, date=2013-06-08, volume=407, issue=8839, page=52, magazine=(The Economist)

, title= The new masters and commanders , passage=From the ground, Colombo’s port does not look like much. Those entering it are greeted by wire fences, walls dating back to colonial times and security posts. For mariners leaving the port after lonely nights on the high seas, the delights of the B52 Night Club and Stallion Pub lie a stumble away.}}

unfrequented by people; desolate.

without companions; solitary.