Expansion tank sizing ashrae. . 2. the amount or degree of expanding. 1. Definition of expansion noun in Oxford Advanced Learner's Dictionary. the increase of something in size…. the increase of something in size, number, or importance: 2. Despite the recession the company is confident of further expansion. synonym Synonym: annex My new office is in the expansion behind the main building. 3. The runway is undergoing expansion to allow bigger planes to land there. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. The expansion of higher education will continue. There are 14 meanings listed in OED's entry for the noun expansion, two of which are labelled obsolete. 4. Aug 14, 2024 · Expansion is the phase of the business cycle where real GDP grows for two or more consecutive quarters, moving from a trough to a peak. To any observer in the universe, it appears that all but the nearest galaxies (which are bound to each other by gravity) move away at 1. When substances are heated, the molecular bonds between their particles are weakened, and the particles move faster, causing the substance to expand. To any observer in the universe, it appears that all but the nearest galaxies (which are bound to each other by gravity) move away at Expansion is usually due to heating. How to use expansion in a sentence. The meaning of EXPANSION is expanse. The expansion of the gas causes the piston to move. Expansion is the part of an engine cycle in which the fluid increases in volume and makes a part such as a piston or flywheel move. the act or process of expanding. EXPANSION definition: 1. [countable] an expanded portion or form of a thing: The book is an expansion of a series of articles. The expansion of the gas pushes the piston inside the cylinder. an expanded portion or form of a thing. Learn more. [1] It is an intrinsic expansion, so it does not mean that the universe expands into anything or that space exists outside it. an act of increasing or making something increase in size, amount or importance. Aug 28, 2025 · (building) A new addition. The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. The book is an expansion of a series of lectures given last year. The meaning of EXPANSION is expanse. See ‘Meaning & use’ for definitions, usage, and quotation evidence. the state or quality of being expanded. los pfz w2jb wq1 lp 7fit0 bkx hvuez lpo fcj