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.
NAICS Code: 561720 SIC Code: 7349, completed by Perry Byers. The building cleaning industry has two main markets: residential and commercial. The residential market primarily consists of maid services, carpet, window and other like services. The commercial cleaning segment focuses primarily on janitorial services which provide a broader range to include carpet and floor care, window cleaning, vacuuming, etc. The cleaning services industry is a $46 billion dollar industry. The industry is expected to grow 5.5% annually through 2009 1 with current business trends toward outsourcing and purchasing by two income families looking for more leisure time.