Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: French
Origin: augmenter, from Late Latin augmentare, from Latin augere 'to increase'

augment

 verb
     
aug‧ment [transitive]
formal to increase the value, amount, effectiveness etc of something:
Any surplus was sold to augment their income.
—augmentation noun [uncountable and countable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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