radical – definition
(especially of change or action) relating to or affecting the fundamental nature of something; far-reaching or thorough.
“a radical overhaul of the existing regulatory framework”
“radical reform is long overdue”
forming an inherent or fundamental part of the nature of someone or something.
“the assumption of radical differences between the mental attributes of literate and non-literate peoples”
“the apparently radical differences between logic and natural language”
(of surgery or medical treatment) thorough and intended to be completely curative.
characterized by departure from tradition; innovative or progressive.
“the city is known for its radical approach to transport policy”
advocating or based on thorough or complete political or social reform; representing or supporting an extreme or progressive section of a political party.
“a radical British activist”
“a radical political movement”
belonging to an extreme section of the Liberal party during the 19th century.
relating to the root of something, in particular:
of the root of a number or quantity.
denoting or relating to the roots of a word.
belonging to the root of a chord.
of, or springing direct from, the root or stem base of a plant.
North American informal
very good; excellent.
“Okay, then. Seven o’clock. Radical!”