- taking place while one is employed: an in-service training program.
Origin of in-service
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- denoting training that is given to employees during the course of employmentan in-service course
Word Origin and History for inservice
Online Etymology Dictionary, © 2010 Douglas Harper