bom ‧ bard ‧ ment /bɒmˈbɑːdmənt $ bɑːmˈbɑːrd-/ BrE AmE noun [uncountable and countable]
a continuous attack on a place by big guns and bombs:
The bombardment continued for a terrible nine hours.
aerial/artillery/naval bombardment (=attack from the air, land, or sea)