| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024ex•pan•sion /ɪkˈspænʃən/USA pronunciation n. - the act or process of expanding;
the state or quality of being expanded:[uncountable]Future expansion of the business will require us to build more factories. The runway is undergoing expansion to allow bigger planes to land there. - [countable] an expanded portion or form of a thing: The book is an expansion of a series of articles.
See -pand-. WordReference Random House Unabridged Dictionary of American English © 2024ex•pan•sion (ik span′shən),USA pronunciation n. - the act or process of expanding.
- the state or quality of being expanded.
- the amount or degree of expanding.
- an expanded, dilated, or enlarged portion or form of a thing:The present article is an expansion of one he wrote last year.
- anything spread out;
expanse. - Mathematics
- the development at length of an expression indicated in a contracted form, as a2 + 2ab + b2 for the expression (a + b)2.
- Mathematicsany mathematical series that converges to a function for specified values in the domain of the function, as 1 + x + x2 + … for 1/(1 - x) when x 1.
- Mechanical Engineering[Mach.]that part of the operation of an engine in which the volume of the working medium increases and its pressure decreases.
- Communications, Businessan increase in economic and industrial activity (opposed to contraction).
- Late Latin expānsiōn- (stem of expānsiō) a spreading out. See expanse, -ion
- 1605–15
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