As a noun panelist

is a person who is a member of a panel.

As an adjective undefined is

lacking a definition or value.

As a noun chorus

is a group of singers and dancers in the religious festivals of ancient greece.

As a verb chorus

is to echo a particular sentiment.

As an adjective undefined is

lacking a definition or value.

As a noun abundance

is a large quantity; many .

As an adjective undefined is

lacking a definition or value.

As a noun contravention

is the act of contravening a rule, regulation, or law, or of not fulfilling an obligation, promise, or agreement.

As an adjective undefined is

lacking a definition or value.

As a noun photodiode

is a semiconductor two-terminal component whose electrical characteristics are light-sensitive.

As an adjective undefined is

lacking a definition or value.

As a noun flatform

is a type of shoe with a flat, platform sole.

As an adjective undefined is

lacking a definition or value.

As a noun breeder

is a person who breeds plants or animals professionally.

As an adjective undefined is

lacking a definition or value.

As a noun airflow

is any flow of air, especially the motion of air around a moving aircraft or aerofoil.

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between attenuate and undefined

is that attenuate is (botany|of leaves) gradually tapering into a petiole-like extension toward the base while undefined is lacking a definition or value.

As a verb attenuate

is to reduce in size, force, value, amount, or degree.

As a noun revel

is an instance of merrymaking; a celebration or revel can be (architecture).

As a verb revel

is to make merry; to have a gay, lively time or revel can be (obsolete) to draw back; to retract.

As an adjective undefined is

lacking a definition or value.