Bible Dictionaries
Rainbow

Webster's Dictionary

(n.) A bow or arch exhibiting, in concentric bands, the several colors of the spectrum, and formed in the part of the hemisphere opposite to the sun by the refraction and reflection of the sun's rays in drops of falling rain.

Bibliography Information
Webster, Noah. Entry for 'Rainbow'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​r/rainbow.html. 1828.