(surgery) Involving a diversion from part of the body that would usually perform a certain function.

(now rare) Deceased, dead. / No longer in use or active, nor expected to be again. / (business) No longer in business or service, nor expected to be again.

To make defunct.

The dead person (referred to).

The state or quality of being defunct.

(obsolete) Death.

plural of defunction

present participle of defunct

(archaic) funereal

simple past tense and past participle of defunct