for a relay which is in the release condition, the time interval between the instant a specified value of the input energizing quantity is applied under specified conditions and the instant when the make contact first closes Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=446-17-03
for a relay which is in the release condition, the time interval between the instant a specified value of the input energizing quantity is applied under specified conditions and the instant when the make contact first closes