to induct (somebody) ceremonially into office
to open (e.g. a new building) ceremonially
to mark the beginning or introduction of (a new system, project, etc)
inaugural adj
inauguration /-ʹraysh(ə)n/ noun
inaugurator noun
inauguratory /-rət(ə)ri/ adj
[Latin inauguratus, past part. of inaugurare to practise augury, later ‘to induct after observing the omens’, from in-2 + augurare to augur]