presentation - the act of making something publicly available; presenting news or other information by broadcasting or printing it; "he prepared his presentation carefully in advance"

commencement, start, beginning - the act of starting something; "he was responsible for the beginning of negotiations"

induction - the act of bringing about something (especially at an early time); "the induction of an anesthetic state"

product introduction - the introduction (usually by an advertising campaign) of a new product or product line

ushering in - the introduction of something new; "it signalled the ushering in of a new era"

naturalisation, naturalization - the introduction of animals or plants to places where they flourish but are not indigenous