Learn how to say Celt correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word Celt:
a member of a group of peoples inhabiting much of Europe and Asia Minor in pre-Roman times. Their culture developed in the late Bronze Age around the upper Danube, and reached its height in the La Tène culture (5th to 1st centuries bc) before being overrun by the Romans and various Germanic peoples.
a native of any of the modern nations or regions in which Celtic languages are (or were until recently) spoken; a person of Irish, Highland Scottish, Manx, Welsh, or Cornish descent.
from Latin Celtae (plural), from Greek Keltoi; in later use from French Celte ‘Breton’ (taken as representing the ancient Gauls)