The definition of mavourneen is an Irish term meaning my darling.
An example of mavourneen is how an Irish man would refer to his wife.
Origin of mavourneen
- Irish Gaelic mo mhuirnín mo my (from Old Irish me-1 in Indo-European roots) muirnín darling diminutive of muirn delight (from Old Irish tumult, revels)
From American Heritage Dictionary of the English Language, 5th Edition