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Efficiency Definition & Meaning - Merriam-Webster
EFFICIENCY | English meaning - Cambridge Dictionary
EFFICIENCY | definition in the Cambridge English Dictionary
Efficiency - Wikipedia
efficiency noun - Definition, pictures, pronunciation and usage …
EFFICIENCY definition and meaning | Collins English Dictionary
Efficiency - Definition, Meaning & Synonyms - Vocabulary.com
Efficiency Definition & Meaning | Britannica Dictionary
EFFICIENCY - Meaning & Translations | Collins English Dictionary
EFFICIENCY Definition & Meaning - Dictionary.com