mobster

[ mob-ster ]
/ ˈmɒb stər /

noun

a member of a criminal mob.

Origin of mobster

1915–20, Americanism; mob1 (in the sense “a member of a criminal gang”)+ -ster
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for mobster

mobster

/ (ˈmɒbstə) /

noun

a US slang word for gangster
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012