noun. A substance added in small amounts to something else to improve, strengthen, or otherwise alter it.

adjective. Marked by, produced by, or involving addition.

adjective. Of or being any of certain primary colors of wavelengths that may be mixed with one another to produce other colors.

To be added; of the nature of an addition; helping to increase: as, an additive correction (a correction to be added).

adjective. Proper to be added; positive; -- opposed to subtractive.

adjective. Pertaining to addition; that can be, or has been, added.

adjective. Distributive over addition.

adjective. Having addition as an operator.

adjective. Pertaining to chemical addition.

adjective. Describing genes (or the interaction etc. of such genes) which govern the same trait and whose effects work together on the phenotype.

noun. A substance added to another substance or product for its ability to alter its properties.

adjective. characterized or produced by addition

adjective. designating or involving an equation whose terms are of the first degree

noun. something added to enhance food or gasoline or paint or medicine