deceased UK /dɪˈsiːst/US /diˈsist/adjective 4noun 2forms 1 adjective4 •deadThat parrot is definitely deceased, and when I purchased it not 'alf an hour ago, you assured me that its total lack of movement was due to it bein' tired and shagged out following a prolonged squawk. — 1969 •One who has died. •Belonging to the dead.The executor's commission for winding up the deceased estate was 3.5%. •Overwhelmed to the point of being figuratively dead.You look so good, I'm deceased! noun2 •One who has died. In property law, the alternate term decedent is generally used in US English. In criminal law, “the deceased” refers to the victim of a homicide. •Synonym of dead (“those who have died”).The deceased was interred in his local churchyard.a memorial to the deceased of two World Wars formsdeceaseds