Dictionary.com
definitions

Modern English

noun

the English language since c1475.
Also called New English.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for modern english

Modern English

noun

the English language since about 1450, esp any of the standard forms developed from the S East Midland dialect of Middle EnglishSee also English, Middle English, Old English
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