redlight

As a verb redlight

is to deny, reject, or disapprove; to prohibit from proceeding.

As an adjective ultraviolet is

of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 nanometre - 10 nanometre.

As a noun ultraviolet is

ultraviolet colour.

As a verb redlight

is to deny, reject, or disapprove; to prohibit from proceeding.

As a noun infrared is

electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm.

As an adjective infrared is

having the wavelength in the infrared.

As verbs the difference between red and redlight

is that red is past tense of rede while redlight is to deny, reject, or disapprove; to prohibit from proceeding.

As an adjective red

is having red as its color.

As a noun red

is any of a range of colours having the longest wavelengths, 670 nm, of the visible spectrum; a primary additive colour for transmitted light: the colour obtained by subtracting green and blue from white light using magenta and yellow filters; the colour of blood, ripe strawberries, etc.

As a proper noun Red

is A nickname given to someone who has or had red hair.