definition of
sec

[1] #1 sec n. [second, s] 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites. wn

[2] #2 sec s. [unsweet] (of champagne) moderately dry. wn

[3] #3 sec n. [secant] ratio of the hypotenuse to the adjacent side of a right-angled triangle. wn

[4] #4 sec n. [Securities and Exchange Commission, SEC] an independent federal agency that oversees the exchange of securities to protect investors. wn