English Collins Dictionary - English synonyms & Thesaurus. 1 adj Something that is unique is the only one of its kind. Each person's signature is unique..., The area has its own unique language, Catalan. â¦ uniquely adv ADV group, ADV with v.
Solar flares are tremendous explosions on the surface of the Sun. In a matter of just a few minutes they heat material to many millions of degrees and release as much energy as a billion megatons of TNT.
Definition of flare for Students. 1  1 : a sudden blaze of light the flare of a match. 2  2 : a blaze of light used to signal, light up something, or attract attention. 3  3 : a device or material used to produce a flare The emergency kit included flares.  4 : a sudden outburst She displayed a flare of anger.