What is a chord?
...it's one of the first 7 letters of the alphabet in upper case form sometimes joined by lower case letters such as "m" "sus" etc. and an occasional number or symbol that, when associated with a diagram shows me what strings to hold down at which fret of the fingerboard (I love using all of these technical musical terms)of my guitar with which fingers so that when I strum the strings it sounds like it should sound according to the melody of the song I'm attempting to sing (which I do better than most) and play (which I'm getting better at) because I'm already familiar with it.
...it's the thing I desparately search for so that I can expand my limited repertoire and therefore provide some variety as I entertain myself and the limited audiences for which I perform.
...it's something that the Forum in general as I browse through it, and some of you in response to my specific requests, have been great in helping me locate and I thank all of you for that. And I really do wish I understood what you've been talking about!