SynonymDefinitionAntonym.com - English Synonym Dictionary

An original creation (i.e., an audio recording) from which copies can be made

Something that serves as a model or a basis for making copies

Being or productive of something fresh and unusual; or being as first made or thought of

(of e.g. information) not secondhand or by way of something intermediary

Not derived or copied or translated from something else

Preceding all others in time or being as first made or performed