1 (happen) ocurrir; suceder to occur again volver a suceder; repetirse; don't let it (ever) occur again que no se vuelva a repetir (nunca); if a vacancy occurs si se produce una vacante; if the opportunity occurs si se presenta la oportunidad
2 (be found) darse; encontrarse the plant occurs all over Spain la planta se da en todas partes en España
3 (come to mind) to occur to sb ocurrírsele a algn; it occurs to me that ... se me ocurre que ...; it occurred to me to ask him se me ocurrió preguntárselo; such an idea would never have occurred to her semejante idea jamás se le hubiera ocurrido or pasado por la mente