|Origin:||From the sound|
1 [intransitive and transitive]TTCTTW
if a vehicle or ship hoots, it makes a loud clear noise as a warning
The car behind was hooting at me.
if an owl hoots, it makes a long 'oo' sound
3 [intransitive and transitive]
to laugh loudly because you think something is funny or stupid
hoot with laughter/glee/mirth etc
He had the audience hooting with laughter.