Definition of "Nominal" :

noun: a phrase that can function as the subject or object of a verb

adjective: existing in name only

"The nominal (or titular) head of his party."

adjective: named; bearing the name of a specific person

adjective: insignificantly small; a matter of form only (tokenish' is informal)

"The fee was nominal."

adjective: of, relating to, or characteristic of an amount that is not adjusted for inflation

"The nominal GDP."

adjective: pertaining to a noun or to a word group that functions as a noun

"Nominal phrase."

adjective: relating to or constituting or bearing or giving a name

"The Russian system of nominal brevity."