inaugural

(noun) an address delivered at an inaugural ceremony (especially by a United States president). Synonyms: inaugural address.

(noun) the ceremonial induction into a position. Synonyms: inauguration. Example: "The new president obviously enjoyed his inauguration."

(adj) occurring at or characteristic of a formal investiture or induction. Synonyms: inaugural (vs. exaugural). Examples: "The president's inaugural address." "An inaugural ball."

(adj) serving to set in motion. Synonyms: initiative, initiatory, first, maiden. Examples: "The magazine's inaugural issue." "The initiative phase in the negotiations." "An initiatory step toward a treaty." "His first (or maiden) speech in congress." "The liner's maiden voyage."