conspicuous by your/its absence

conspicuous by (one's) absence

Noticeably missing from something. You're the loudest one in the class, so of course you're conspicuous by your absence!
See also: absence, by, conspicuous

conspicuous by your/its absence

If someone or something is conspicuous by their absence, people notice that they are not there. He played no part in the game and was conspicuous by his absence at the post-match celebrations. Mathematics and science were conspicuous by their absence at the university.
See also: absence, by, conspicuous