inaugural
🇺🇸
/ɪˈnɔːɡjərəl/
🇬🇧
/ɪˈnɔːɡjərəl/
the first one in a series, marking the start of something important
She gave an inspirational speech at her inaugural lecture.
the first speech or event that starts a new period, especially for a new leader
People gathered to listen to the president's inaugural.