insanity
n. mental illness of such a severe nature that a person cannot distinguish fantasy from reality, cannot conduct her/his affairs due to psychosis, or is subject to uncontrollable impulsive behavior. Insanity is distinguished from low intelligence or m ...

insanity defense
n. the claim of a defendant in a criminal prosecution that he/she was insane when the crime was committed, usually only temporarily. See also: insanity temporary insanity.

insertion
n. the addition of language at a place within an existing typed or written document, which is always suspect unless initialled by all parties.

insider
n. someone who has a position in a business or stock brokerage, which allows him/her to be privy to confidential information (such as future changes in management, upcoming profit and loss reports,

insider trading
n. the use of confidential information about a business gained through employment in a company or a stock brokerage, to buy and/or sell stocks and bonds based on the private knowledge that the value will go up or down.

insolvency
n. 1) the condition of having more debts (liabilities) than total assets which might be available to pay them, even if the assets were mortgaged or sold. 2) a determination by a bankruptcy court that a person or business cannot raise the funds to pay ...

inspection of documents
n. the right to examine and copy the opposing party's papers in a lawsuit which are relevant to the case. A demand (legal request) may be made, but the categories of documents must be stated so that the other party can know what he/she must produce.