Definitions of original:

• noun:   an original model on which something is patterned
• noun:   an original creation (i.e., an audio recording) from which copies can be made
• adjective:   being or productive of something fresh and unusual; or being as first made or thought of

  Example: "A truly original approach"

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

  Example: "His work is based on only original, not secondary, sources"

• adjective:   not derived or copied or translated from something else

  Example: "The play is original"

• adjective:   preceding all others in time or being as first made or performed

  Example: "The original inhabitants of the Americas"