say it: uh-KREE-shuhn
accretion is a noun meaning "an increase by natural growth or addition". It carries 6 recorded senses.
an increase by natural growth or addition
something contributing to growth or increase
“he scraped away the accretions of paint”
“the central city surrounded by recent accretions”
(astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
astronomy
(geology) an increase in land resulting from alluvial deposits or waterborne sediment
geology
(law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance)
law
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for accretion come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.