1. radical - Noun
2. radical - Adjective
3. radical - Adjective Satellite
Of or pertaining to the root; proceeding directly from the root.
Hence: Of or pertaining to the root or origin; reaching to the center, to the foundation, to the ultimate sources, to the principles, or the like; original; fundamental; thorough-going; unsparing; extreme; as, radical evils; radical reform; a radical party.
Belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs.
Proceeding from a rootlike stem, or one which does not rise above the ground; as, the radical leaves of the dandelion and the sidesaddle flower.
Relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form.
Of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below.
A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon.
A primitive letter; a letter that belongs to the radix.
One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative.
A characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom.
Specifically, a group of two or more atoms, not completely saturated, which are so linked that their union implies certain properties, and are conveniently regarded as playing the part of a single atom; a residue; -- called also a compound radical. Cf. Residue.
A radical quantity. See under Radical, a.
A radical vessel. See under Radical, a.
Source: Webster's dictionaryThe most radical revolutionary will become a conservative the day after the revolution. Hannah Arendt
There is a big difference between fighting the cold war and fighting radical Islam. The rules have changed and we haven't. John le Carré
The cornerstone of the political correctness that dominates campus culture is radical feminism. Phyllis Schlafly
To be truly radical is to make hope possible, rather than despair convincing. Raymond Williams
Radical simply means "grasping things at the root." Angela Davis
If you have always believed that everyone should play by the same rules and be judged by the same standards, that would have gotten you labeled a radical 60 years ago, a liberal 30 years ago and a racist today. Thomas Sowell