A form of illustration whose main goal is to convey a visual representation of a concept.

In a concerned manner; worriedly.

conciliatory

Alternative spelling of proof of concept

A large building where concerts are performed.

Used other than figuratively or idiomatically: see in, concert. / Acting together

Synonym of to whom it may concern

To celebrate along with others / (of a newly ordained priest) To celebrate a mass along with the bishop who ordained him

plural of concert hall

A person who, or thing which, concludes (in any sense)