ETYM Cf. French activité, Late Lat. activitas.
1. Any specific activity or pursuit.
2. The state of being active
3. An organic process that takes place in the body
4. A process existing in or produced by nature (rather than by the intent of human beings)
5. The trait of being active; moving or acting rapidly and energetically
The power to be effective; SYN. effectivity, effectualness, effectuality.
Not the same as The effectiveness of a proposal or project is a measure of its effect. An effective project produces a desired change.
ETYM Latin efficacia, from efficax. Related to Efficacious.
Capacity or power to produce a desired effect; SYN. efficaciousness.
1. Skillfulness in avoiding wasted time and effort.
2. The ratio of the output to the input of any system.
Output of a machine (work done by the machine) divided by the input (work put into the machine), usually expressed as a percentage. Because of losses caused by friction, efficiency is always less than 100%, although it can approach this for electrical machines with no moving parts (such as a transformer).
Since the mechanical advantage, or force ratio, is the ratio of the load (the output force) to the effort (the input force), and the velocity ratio is the distance moved by the effort divided by the distance moved by the load, for certain machines the efficiency can also be defined as the mechanical advantage divided by the velocity ratio.
Competency or capability of performance. Producing desired change with little waste of money, resources, time, etc.
ETYM Old Eng. vertu, French vertu, Latin virtus strength, courage, excellence, virtue, from vir a man. Related to Virile, Virtu.
1. A particular moral excellence.
2. Morality with respect to sexual relations; SYN. chastity, sexual morality.
3. The quality of doing what is right and avoiding what is wrong; SYN. virtuousness, moral excellence.
Originally, ability or efficiency, often involving moral worth. In classical Greek it is used especially to refer to manly qualities. Christian teaching distinguishes the cardinal virtues of prudence, temperance, fortitude, and justice, from the theological virtues of faith, hope, and love (or charity) which St Paul gives as the basis of Christian life.