Incazelo yesichazamazwi ethi "isikhiya somoya" iyidivayisi noma igumbi elisetshenziselwa ukuvimbela ukungena noma ukuphuma komoya phakathi kwezikhala ezimbili ezinomfutho womoya ohlukile, ngokuvamile osetshenziswa kumkhumbi-mkhathi, umkhumbi-ngwenya, noma igumbi lokuntywila. Isikhiya somoya siklanyelwe ukuvumela abasebenzi noma izinto ukuthi zingene noma ziphume endaweni eyodwa ngaphandle kokuphazamisa umfutho womoya noma ukwakheka kwesinye isikhala. Ngokuvamile, isikhiya somoya yinoma yiliphi igumbi eliklanyelwe ukulawula ukungena noma ukuphuma komoya noma amanye amagesi.