Definition of old-line
- an old-line firm
- old-line families
archconservative, brassbound, button-down (or buttoned-down), conservative, die-hard, hidebound, old-fashioned, old-school, orthodox, reactionary, standpat, traditional, traditionalistic, ultraconservative, unprogressive;
: having a good reputation because of the high quality of a service, product, etc., that has been provided for many years
: powerful and important in a society for a long time
: supporting traditional policies or practices : not encouraging or liking change within an organization
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