The property of a person of having high ideals that are usually unrealizable or at odds with practical life.

In an idealistic manner.

One who theorizes or idealizes; one who advocates the doctrines of ideology.

Of or pertaining to an idealist or to idealism.

(mathematics) A function whose value is always the same as its independent variable, and for which the codomain equals the domain.

(complex analysis) The equation e^(i𝜋)=-1,!, which unifies diverse fields of mathematics.

(emphatic) I don't know. / Indicates that the speaker is completely ambivalent about something.

The conceptualization of a mental image. / (often business) The synthesis of ideas.

(sociology) Behaviour that is characterized by both the desire and the ability to progress towards an ideal by choosing a new goal when a previous one has been met or the effort to meet it has failed.

(radio, telecommunications) The storage and retrieval of data using tags attached to individual packages, animals or people; the tags contain an integrated circuit to store and process the data, and an antenna to transmit and receive such data.