(idiomatic) A long time; the long term; an extended period. / a long distance

Displaying sadness. / (literally) Having a long face.

plural of long arm

(slang, UK) An individual who steals things or borrows them without asking.

Operating for a relatively extended period of time.

Having been missing or unknown for a long period of time.

Operating, or capable of operating, over a great distance. / Involving a great period of time.

Having endured mental or physical discomfort for a protracted period of time patiently or without complaint.

Long endurance or patience.

Over a great length or distance. / Referring to a non-local telephone call; a toll call. / Referring to a romantic relationship: between two people with a considerable distance between them.