BMX is a sport of racing on bicycles on motocross style tracks.
BMX can also refer to:
BMX bike, a bicycle used for casual use and sport, and designed mainly for dirt and motocross cycling Big Mountain Air Force Station (IATA: BMX), a military use airstrip located near Big Mountain, Alaska Cytoplasmic tyrosine-protein kinase BMX, an enzyme that in humans is encoded by the BMX gene BMX (quadraphonic sound), a quadrophonic sound system