informance1
/ɪnˈfɔːməns/rare after early 17th cent
noun
The action of inform; informing; information.
Origin
Early 17th century; earliest use found in Thomas Bilson (?1547–1616), bishop of Winchester. From inform + -ance. Compare post-classical Latin informantia reception of form or formal cause.
informance2
/ɪnˈfɔːməns/noun
A performance intended to be both educational and entertaining; especially a musical concert which includes an informative talk about the piece or instruments being played.
Origin
1970s; earliest use found in The Chicago Tribune. Blend of either informative or information and performance.