The state of being accurate; being free from mistakes, this exemption arising from carefulness; exactness; correctness
‘The value of testimony depends on its accuracy.’;
The extent to which time is well used for the intended task.
‘The efficiency of the planning department is deplorable.’;
Exact conformity to truth, or to a rule or model; degree of conformity of a measure to a true or standard value.
(dated) The quality of producing an effect or effects.
The state of being accurate; freedom from mistakes, this exemption arising from carefulness; exact conformity to truth, or to a rule or model; precision; exactness; nicety; correctness; as, the value of testimony depends on its accuracy.
‘The professed end [of logic] is to teach men to think, to judge, and to reason, with precision and accuracy.’; ‘The accuracy with which the piston fits the sides.’;
The extent to which a resource, such as electricity, is used for the intended purpose; the ratio of useful work to energy expended.
‘The efficiency of this loudspeaker is 40%.’;
the quality of nearness to the truth or the true value;
‘he was beginning to doubt the accuracy of his compass’; ‘the lawyer questioned the truth of my account’;
A one-room apartment.
‘I have an efficiency available June through July.’; ‘fully-furnished efficiencies’;
(mathematics) the number of significant figures given in a number;
‘the atomic clock enabled scientists to measure time with much greater accuracy’;
the ratio of the output to the input of any system
the quality or state of being correct or precise
‘we have confidence in the accuracy of the statistics’;
skillfulness in avoiding wasted time and effort;
‘she did the work with great efficiency’;
the degree to which the result of a measurement, calculation, or specification conforms to the correct value or a standard
‘accuracies of 50–70 per cent’; ‘the accuracy of radiocarbon dating’;
Efficiency is the (often measurable) ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without waste.