Celticism

Celticism may refer to:
 * A word or linguistic property adapted from a Celtic language
 * List of English words of Celtic origin
 * List of English words of Scottish Gaelic origin
 * Irish words used in the English language
 * List of English words of Irish origin
 * List of English words of Welsh origin
 * Hiberno-English
 * Kiltartanese
 * Political pan-Celticism
 * The ideology of Lega Nord which culturally identifies with the Celtic people
 * The romanticist Celtic Revival
 * Celts (modern), a modern Celtic identity that has emerged in Western Europe since the 18th century
 * Celtism also known as Celtic neopaganism
 * Celticisation, the historic process of conquering and assimilating by the ancient Celts