To modify the design of an existing system, organization, process or product in order to make it more effective, efficient or responsive.

plural of week-end

(idiomatic) Insensitivity to and inability to appreciate the elements of performed music or the rhythm, elegance, or nuances of language.

(ornithology) A neotropical eagle, Harpia harpyja.

(logic, philosophy) A supposed paradox concerning whether chickens or chicken eggs existed first. / (logic, philosophy) A question to decide which of two interdependent things happened first.

(humanities) An academic discipline that includes the study of literatures written in the English language, English linguistics, and English sociolinguistics.

Alternative spelling of chicken-or-egg question

A kind of edible fungus, Auricularia auricula-judae, growing on tree-trunks, formerly used for medicinal purposes.

The part of a swimming pool with relatively deep water / (idiomatic) A situation where expertise or experience is required.

The termination point of a railway or similar transportation system.