plural accretions
1
: a gradual process in which layers of a material are formed as small amounts are added over time
rocks formed by the slow accretion of limestone
—often used figurativelyThe gradual accretion of detail creates a complex and moving story.
2
: something that has grown or accumulated slowly : a product or result of gradual growth
strangely shaped limestone accretions
There was an accretion of ice on the car's windshield.
Cite this Entry
“Accretion.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/accretion. Accessed 19 Jun. 2026.
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