Concerted

Dictionary day again.  My finger fell on the word “concerted.”  I thought you beaudy, as I was thinking in terms of making a real effort, as in, “they made a concerted effort to finish the task.”
But no this was the musical definition. “arranged in several parts of equal importance.”  I did not even know it had such a meaning.  It does make sense to me that it does, as it is a word from the “concert” family.  I can also see how it has come to mean what it does when I look at even a “concerted effort” being an effort done by more than one working together to achieve the desired result.  In music there are several parts working together in the one piece, while in industry or whatever there are several working together on one piece.
Apparently it first started to be used around 1700.  It has found its way into our usage mostly as the non-musical definition.  According to one site I visited “concerted” has four meanings but I did not explore them as I needed to acquire a subscription to access the rest of the site.
I did go elsewhere and found four definitions: 1 A concerted action is done by several people or groups working together; 2 If you make a concerted effort to do something, you try very hard to do it; 3 mutually contrived, planned, or arranged; combined (esp in the phrases concerted action, concerted effort); 4 arranged in parts for a group of singers or players.
Some of those meanings are to me very close to one another.  My takeaway from it all though is a “working together in harmony to achieve a desired result.”  There is one definition that relates to an individual achieving but the other three (75%) relate to groups of people.  It does not seem to matter if it is in music or in a task at hand the important thing is working together to get something done.
Who would have thought?  That word was not on my radar.  But I need to use the individual definition right now and make a concerted effort to prepare for the air conditioner guy coming.