"death," 1869, a euphemistic verbal noun from pass (v.) in such Middle English phrases as passing of death, passing of the soul (c. 1300). A passing-bell (1520s) was a church bell tolled at the time of a person's death.
mid-14c., "transitory;" late 14c., "going by," present-participle adjective from pass (v.). Also from late 14c. as "surpassing, excellent," and "casual, superficial, cursory, as though done in passing." Related: Passingly.
"act of passing by, an omission or disregarding," 1580s, from Latin pretermissionem (nominative pretermissio) "an omission, a passing over," noun of action from past-participle stem of praetermittere "to pass by, let pass, neglect" (see pretermit).
"dappled, marked with spots or patches of color of unequal intensity passing insensibly into one another," 1670s, past-participle adjective from see mottle (v.).
1660s, "action of passing the winter" (of plants, insect eggs, etc.), from Latin hibernationem (nominative hibernatio) "the action of passing the winter," noun of action from past participle stem of hibernare "to winter, pass the winter, occupy winter quarters;" related to hiems "winter," from PIE root *gheim- "winter." Meaning "dormant condition of animals" is from 1789.