definition of
SEC

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

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

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

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