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.
The Tax Department uses NAICS codes to: 1  identify vendors that should be targeted to receive important information related to specific industries; and.  help collect, compile, and analyze statistical data reports related to taxation issues (e.g., Taxable Sales and Purchases - County and Industry Data for 3/09-2/10).