say it: OH-vur-bawrd
overboard is an adverb meaning "to extremes". It carries 2 recorded senses.
to extremes
“he went overboard to please his in-laws”
from on board a vessel into the water
“they dropped their garbage overboard”
Definitions, synonyms and semantic relations for overboard come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. .