the awarding of higher grades than students deserve either to maintain a school's academic reputation or as a result of diminished teacher expectations.
a rise in the average grade given to students.
Origin of grade inflation
First recorded in 1980–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
an apparently continual increase in numbers of students attaining high examination grades, or the practice of awarding grades in this way
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