pass from physical life and lose all bodily attributes and functions necessary to sustain life
"She died from cancer"
"The children perished in the fire"
"The patient went peacefully"
"The old guy kicked the bucket at the age of 102"
To die.
"The old cat finally expired in its sleep after years of suffering from arthritis."
The word "expire" comes from the Latin verb expīrō, which combines a prefix meaning "out" with a root for breathing. It entered English through Middle French and originally referred to ceasing to breathe or dying before taking on its modern sense of ending in time.