nutshell /ˈnʌt.ʃɛl/noun 3verb 1forms 3phrases 1 noun3 •The shell that surrounds the kernel of a nut.For men be now tratlers and tellers of tales; What tidings at Totnam, what newis in Wales, What shippis are sailing to Scalis Malis? And all is not worth a couple of nut shalis. — 1515 •A short book summarizing an area of law. •A small boat; a boat considered small in comparison to the seas. verb1 •To summarize (from the term in a nutshell). formsnutshelled · nutshelling · nutshells Phrases with nutshell in a nutshellIn summary; briefly or simply.