Tairngreacht belongs to the world of Irish prophetic tradition in which specially gifted individuals — druids, poets, saints — could access knowledge of future events through inspiration, vision, or supernatural communication. Prophetic poetry in Irish literature ranges from the gnomic utterances of mythological sages to the politically charged prophecies of eighteenth-century aisling verse predicting the Stuart restoration. The tradition of tairngreacht established an expectation that the poet was also a seer, and this prophetic dimension — the claim that verse could tell true things about the future — gave Irish poetry a cultural authority beyond aesthetic pleasure.

Tairngreacht (prophecy) in Irish poetry is a prophetic utterance, often delivered in a trance or visionary state. It predicts future events, usually with ambiguous language. Poets use tairngreacht to comment on political or social changes, offering hope or warning. It reflects the belief in the poet's supernatural insight. Tairngreacht is a powerful rhetorical device, lending authority to the poet's voice. Understanding tairngreacht helps interpret the predictive and political dimensions of Irish verse.