Canarium megalanthum is a tree in the family Burseraceae. The specific epithet ' is from the Greek meaning 'large flower'.
Canarium megalanthum grows up to tall with a trunk diameter of up to . The grey bark is smooth to scaly. The ellipsoid fruits measure up to long.
Canarium megalanthum grows naturally in Sumatra, Peninsular Malaysia and Borneo. Its habitat is mixed dipterocarp forest from sea-level to altitude.