Dictionary.com
definitions

launderette

[lawn-duh-ret, lahn‐, lawn-duh-ret, lahn‐]
noun
  1. a self-service laundry having coin-operated washers, driers, etc.
Also laun·drette [lawn-dret, lahn‐] /lɔnˈdrɛt, lɑn‐/.

Origin of launderette

First recorded in 1945–50; formerly a trademark
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for launderette

Launderette

noun trademark
  1. British and NZ a commercial establishment where clothes can be washed and dried, using coin-operated machinesAlso called (US, Canadian, and NZ): Laundromat
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