Def and Jim-dandy

Def adjective - Keenly aware of and responsive to the latest developments especially in fashion and entertainment.

Jim-dandy and def are semantically related. In some cases you can use "Jim-dandy" instead an adjective "Def".

Jim-dandy adjective - Of the very best kind.

Def and jim-dandy are semantically related. Sometimes you can use "Def" instead an adjective phrase "Jim-dandy".