Definition of "Universal" :

noun: coupling that connects two rotating shafts allowing freedom of movement in all directions

"In motor vehicles a universal joint allows the driveshaft to move up and down as the vehicle passes over bumps."

noun: a behavioral convention or pattern characteristic of all members of a particular culture or of all human beings

"Some form of religion seems to be a human universal."

noun: (logic) a proposition that asserts something of all members of a class

noun: (linguistics) a grammatical rule (or other linguistic feature) that is found in all languages

adjective: of worldwide scope or applicability

"Universal experience."

adjective: adapted to various purposes, sizes, forms, operations

"Universal wrench."

adjective: applicable to or common to all members of a group or set

"The play opened to universal acclaim."