Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Perspire(verb) to excrete matter through the skin; esp., to excrete fluids through the pores of the skin; to sweat. 2  Perspire(verb) to be evacuated or excreted, or to exude, through the pores of the skin; as, a fluid perspires.
Introduction to NAICS. The North American Industry Classification System (NAICS) is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy.
What is the difference between a SIC and a NAICS code? NAICS codes provide a greater level of detail about a firm's activity than SIC codes. NAICS includes 1,170 industries and SIC includes 1,004 industries. There are 358 new industries recognized in NAICS, 250 of which are services producing industries.