old-line /ˈoʊldˈlaɪn/ adjective Learner's definition of OLD-LINE
always used before a noun [more old-line; most old-line] US
1
a : having a good reputation because of the high quality of a service, product, etc., that has been provided for many years老牌的 b : powerful and important in a society for a long time名门望族的 2
: supporting traditional policies or practices : not encouraging or liking change within an organization保守的