1. brought to a state of ruin Tramping over the fields looking for the ruinate Thistlewood house was an experience I won't soon forget … — Richard B Sheridan
2. to damage or destroy (something) completely ruin I will not ruinate my father's house, Who gave his blood to lime the stones together … — William Shakespeare I guess they'll ruinate the crops yet, and make the ground so everlasting foul … — Thomas Chandler Haliburton