1) Expose 2) Expose to sunlight 3) Expose to the sun 4) Solarise 5) Solarize 
to treat by exposure to the sun's rays
• (v. t.) To dry in, or to expose to, the sun`s rays; to ripen or prepare by such exposure.
In'so·late transitive verb [ imperfect & past participle Insolated ; present participle & verbal noun Insolating .] [ Latin insolatus , past participle of insolare to expose to the sun; prefix in- in + sol t...
insolate 1. To expose to the sun's rays. 2. To expose something to sunlight.
to expose to the sun's rays; treat by exposure to the sun's rays.