What is "annotates"

Usage examples of "annotates".

And his biographer here annotates on the margin this reflection: "Stupefied ones are worse than merely carnal.

Mr Mottram annotates this theme with some rigour (his book has good bits too), and he does draw haphazard attention to the things that make Burroughs worth looking at: his great scenes of interrogation and manipulation, the desolate evil of his wound-down cities and inert, vicious bureaucracies, that sense of wasted and pre-doomed humanity which animates his best writing.