A knife with blades or tools that the user can fold or retract into its handle, and of a size small enough for carrying safely and handily in a pocket. Since the late 19th century the term "penknife" has not been distinct from "pocketknife", but the latter tends to refer to larger and more robust versions, sometimes with more attached tools, suited to heavier duty for casual or ad hoc applications outdoors or in workshops.

A working lunch at which important discussions may be held, and important decisions made.

(psychology) A psychological condition that develops following some stressful situation or event, with symptoms such as sleep disturbance, recurrent dreams, flashbacks, hypervigilance, depression, dissociation, withdrawal or lack of concentration.

Coming into view suddenly from a concealed position. / Opening out to form a three-dimensional structure when the page of a book is opened. / Operating or existing for a brief period only; temporary.

A pop-up advertisement; an advertisement that is triggered to appear on a computer screen when an Internet user accesses a particular web page.

(Internet, advertising) An advertisement that takes the form of a window that appears automatically on a computer screen when certain websites are visited.

(law) the eligible population from which jury members can be selected

an local investigation, in medieval England, into the lands of a deceased person in order to discover what income and legal rights were due to the crown

(sculpture) Native American sculpture made by carving trees.

Alternative form of hop and pop