(computer security) An entity capable of being authenticated by a computer system or network.

(rare) plural of second base

Penultimate, next to last, immediately preceding the end of a sequence or list.

(literally) Only one second; a passage of time one-sixtieth of a minute in duration. / (idiomatic) A short period of time, typically anywhere from a few seconds to several minutes or more.

(idiomatic) Stop; wait. Used to indicate that the speaker wishes the previous speaker or the proceedings to stop so that he or she can comment on what has been said or has happened so far.

a rule of thumb by which a driver may maintain a safe following distance, allowing at least a two second interval behind any vehicle that is directly in front of the driver's vehicle.

(law) A level of felony somewhat mitigated by various factors. / (of burns) An level of moderate damage, typically involving painful blistering of the skin.

(computer security) Relying on a potential attacker's lack of knowledge will maintain security.

(pathology) Any infection that arises subsequent to a pre-existing infection; but especially a nosocomial infection

plural of second-person singular