What is "in a nutshell"

Nutshell \Nut"shell`\, n.

1. The shell or hard external covering in which the kernel of a nut is inclosed.

2. Hence, a thing of little compass, or of little value.

3. (Zo["o]l.) A shell of the genus Nucula.

   in a nutshell in a summarized and very abbreviated form; -- of statments, descriptions, reports, and other communications; as, to describe the convention in a nutshell.

   To be in a nutshell or To lie in a nutshell, to be within a small compass; to admit of very brief or simple determination or statement. ``The remedy lay in a nutshell.''
   --Macaulay.

adv. (context idiomatic English) In summary; briefly or simply.

adv. summed up briefly; "gave the facts in a nutshell"; "just tell me the story in a nutshell"; "explained the situation in a nutshell"

In a Nutshell is the second album by Swedish singer-songwriter Pelle Carlberg.