Definition of old-line
- an old-line firm
- old-line families
: 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
What made you want to look up old-line? Please tell us where you read or heard it (including the quote, if possible).
the quality or fact of being simultaneous
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