American English

Definition of approximately adverb from the Oxford Advanced American Dictionary

    

approximately

 adverb
adverb
NAmE//əˈprɑksəmətli//
 
 
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 used to show that something is almost, but not completely, accurate or correct The trip takes approximately seven hours. The two buildings were approximately equal in size. Vocabulary Buildingways of saying “approximately” The flight takes approximately three hours. The tickets cost about $20 each. You can expect to earn around $40,000 a year. The repairs will cost $200, give or take a few dollars. How much will it cost, more or less? We are expecting thirty or so people to come. She must be 25 or thereabouts. Profits have fallen by roughly 15%. The price is somewhere around $800. She earns somewhere in the region of $25,000. All these words and phrases are used in both speaking and writing;about is the most common and approximately the most formal.
See the Oxford Advanced Learner's Dictionary entry: approximately