Rock music is often defined as sublimated, transformed sexual energy.
Documentary is often defined as being in some way beholden to truth.
The effect is often defined as the ejection of electrons from a metal plate when light falls on it.
Unlike languages, which have concrete rules, gender is often defined as much by what it isn't as what it is, and learned by doing.
Boredom is often defined as a state of dissatisfaction with the dullness of a situation – usually with a bit of restlessness and fatigue.
GOOD design is often defined as an elegant solution (or a series of elegant solutions) to a complex equation whose variables include space, money, time and human behavior.
A recession is often defined as two consecutive quarters of falling output, though many economists say it is important to take other data into account.
— Abstraction is often defined as what it is not: it is not representational, not objective, not figurative, not realistic, not narrative.
Access is often defined as distance, or proximity, from residents' homes to recreational areas.
Recession is often defined as two consecutive quarters of negative growth - or economic contraction.
The problem (P) with vector criterion is often defined as set-valued vector optimization.
