The noun yellow has 1 sense (first 1 from tagged texts)
1. (8) yellow, yellowness -- (yellow color or pigment; the chromatic color resembling the hue of sunflowers or ripe lemons)
Overview of verb yellow
The verb yellow has 1 sense (first 1 from tagged texts)
1. (2) yellow -- (turn yellow; "The pages of the book began to yellow")
Overview of adj yellow
The adj yellow has 6 senses (first 3 from tagged texts)
1. (26) yellow, yellowish, xanthous -- (of the color intermediate between green and orange in the color spectrum; of something resembling the color of an egg yolk)