Acid House or Acidn (Music, other) a type of funk-based electronically edited disco music of the late 1980s, which has hypnotic sound effects and is associated with hippy culture and the use of the drug ecstasy[C20: perhaps from acid (LSD) + House (music)]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014