Can anyone enlighten us on the origin of the second definition, "To go together, to fit in"? This appears to have sprung forth from confusion with the older term "jibe".

For years I have winced, but usually held my tongue, when I heard individuals use "jive" when I believed that they should have employed "jibe". Have I been wrong all these years? Am I just a pedantic old fuddy-duddy who needs to learn to accept the adoption of what were sloppy mistakes into acceptable speech?