Relating to or affecting the fundamental nature of something; far-reaching or thorough.
The company underwent a radical transformation to improve its efficiency.
Advocating or based on thorough or complete political or social change; representing or supporting an extreme or progressive section of a political party.
She was known for her radical views on environmental policies.
Characterized by departure from tradition; innovative or progressive.
The artist's radical approach to painting challenged conventional techniques.
Relating to the root of a number, quantity, or equation in mathematics.
Solving radical equations often involves isolating the radical term.
Botany: growing from or pertaining to the root of a plant.
Dandelions have radical leaves that form a basal rosette.
US informal: excellent, impressive, or cool.
That skateboard trick was totally radical!
Medicine: involving the complete removal of diseased tissue or an organ, often in an extensive surgical operation.
The surgeon recommended a radical mastectomy to prevent the spread of the cancer.