adj.

outdated (Damirules)

moot (alia20); outdated (triumfov); obsolete (Lavrov); beside the point (If the court clearly lacks jurisdiction, issue of liability is beside the point. ArishkaYa); out of date (Moscowtran); untopical (However unjustified this disparaging evaluation may be, it is very difficult to answer the question as to when Karamzin became untopical in Russian literature. george serebryakov)

entr.

historic (askandy)

figur.

shaggy-dog (об анекдоте, истории и т. п. Vadim Rouminsky)

Gruzovik, figur.

academic (unpractical)

non-topical

inform.

twelve seconds ago (Yanamahan; ??? SirReal); played-out (Ремедиос_П); played out (Ремедиос_П)

livr.

off the table (о вопросе; контекстный перевод igisheva)

pharm.