keynote
noun
-
a fundamental or central idea“Uncertainty is one of the keynotes of quantum theory.”
-
the first note of a diatonic musical scale“C is the keynote of the scale.”tonic
-
the principal theme in a speech or literary work“Once I realized isolation was a keynote of the novel, all the symbolism made sense.”
verb
-
to set the keynote of“That song keynotes the album.”
-
to deliver the keynote address to an audience“I'm supposed to keynote this conference.”