Any departure from convention or from factual accuracy taken by a writer to achieve a desired effect(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "poetic licence" in a sentence
"It was a pretty birthmark, and perhaps Andrew Southern had used a little poetic licence — a lover’s rose-coloured glasses — when he’d painted it there above the woman’s breast?"
"In the autobiographical romance "Dichtung und Wahrheit" (1811-33) the poet tells with poetic licence the story of his life."