1.
relating to or built in the style characteristic of European architecture in the 11th and the 12th centuries, especially in having rounded arches and barrel vaults
2.
characteristic of or relating to the style of European painting, sculpture, or decorative arts contemporary with Romanesque architecture.
3.
belonging to a style of building that was common in Western Europe from about 900 to 1200 ad. Romanesque buildings have round arches, curved ceilings, thick walls, and large pillars.