riotous

UK: /ˈraɪətəs/ US: /ˈraɪətəs/ ,(rī′ə təs)

WordReference Random House Learner's Dictionary of American English © 2022

ri•ot•ous /ˈraɪətəs/  adj. 

1. of or relating to a riot:
   the riotous undergraduates; a riotous night on the town.

WordReference Random House Unabridged Dictionary of American English © 2022

ri•ot•ous  (rī′ə təs), adj. 

1. (of an act) characterized by or of the nature of rioting or a disturbance of the peace.
2. (of a person) inciting or taking part in a riot.
3. given to or marked by unrestrained revelry;
   loose;
   wanton:
   riotous living.
4. boisterous or uproarious:
   riotous laughter.
5. hilariously funny.

• 1300–50; Middle English; see riot, -ous

ri′ot•ous•ly, adv. 
ri′ot•ous•ness, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

riotous /ˈraɪətəs/ adj

1. proceeding from or of the nature of riots or rioting
2. characterized by wanton or lascivious revelry: riotous living
3. characterized by boisterous or unrestrained merriment: riotous laughter

ˈriotously adv ˈriotousness n