roundoffとは 意味・読み方・使い方

動詞

round off (third-person singular simple present rounds off, present participle rounding off, simple past and past participle rounded off)

1. (transitive) To change the shape of (an object) to make it smoother and especially more circular or ovoid.

   Antonym: square off

2. (mathematics, transitive, intransitive) To change (a number) to an approximation having fewer significant digits.

   Hyponyms: round down, round up

   The instructions say that we are not to round off until we reach the final figure. [in a calculation with interim steps]

   Round off 15.4 to 15, round off 15.51 to 15.5 or to 16, round off 0.499 to 0, and round off 970,000 to 1 million.

   "This product contains no PCBs" is a typical commercial distortion if it actually contains 0.498 of the measurement unit, rounded off to "0"

3. (transitive) To complete or finish something.

   Antonyms: finish up, polish off

   Coordinate term: round out

   • 1942 July-August, T. F. Cameron, “How the Staff of a Railway is Recruited”, in Railway Magazine, page 206:

     After this general training the apprentices are usually employed for a year or two as supernumeraries, being engaged to a large extent on special enquiries, a type of work well suited to rounding off their training and also to assisting both the company and the men to ascertain the type of work for which they are best suited.

   • 2011 September 2, Phil McNulty, “Bulgaria 0-3 England”, in BBC‎:

     Manchester United's in-form striker rose to head home Stewart Downing's corner and then rounded off a sweeping counter-attack involving Theo Walcott and Ashley Young to wrap up the formalities seconds before the break.

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