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factor in

British

verb

(tr, adverb) to take account of (something) when making a calculation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

factor in Idioms

Figure in, include as a basic element. For example, In preparing the schedule we factored in vacation and sick days. This term comes from mathematics. [Mid-1900s]

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

These findings strengthen the case for ELOVL2 as a major factor in aging.

From Science Daily • Apr. 22, 2026

Those traders have theorized that total trading activity may be a factor in deciding the number of tokens received.

From Barron's • Apr. 22, 2026

Be sure to factor in income taxes, too.

From MarketWatch • Apr. 22, 2026

Cost of living remains the most important factor in determining residents’ quality of life, a measure that fell from 2025 rankings, the survey found.

From Los Angeles Times • Apr. 16, 2026

These natural cancer-causing agents are still a factor in producing malignancy; however, they are few in number and they belong to that ancient array of forces to which life has been accustomed from the beginning.

From "Silent Spring" by Rachel Carson

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023