plural expansions
1
: the act of becoming bigger or of making something bigger : the act of expanding
territorial expansion
The league is undergoing expansion.
economic expansion
the expansion of a lecture series into a book
2
: a more complete and detailed written work or set of comments based on something shorter
This book is an expansion of a lecture series.
—often + on or uponHer remarks today were an expansion on her earlier comments regarding the budget.
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“Expansion.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/expansion. Accessed 21 Jun. 2026.
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