To add to the gloom, several high-profile Ebola cases have occurred in health-care workers treating patients with the disease.
The breakdown of law and order in Pakistan has occurred over time.
Sig Gissler, the administrator of the Pulitzer Prizes, said this is "not unusual"—it's occurred 11 times before.
1520s, "meet, meet in argument," from Middle French occurrer "happen unexpectedly" or directly from Latin occurrere "run to meet, run against, befall, present itself," from ob "against, toward" (see ob-) + currere "to run" (see current (adj.)). Sense development is from "meet" to "present itself" to "appear" to "happen" ("present itself in the course of events"). Meaning "to come into one's mind" is from 1620s. Related: Occurred; occurring.