IPA: /ˈdʌlər/
KK: /ˈdʌlər/
Less interesting or exciting than something else; lacking brightness or sharpness.
The movie was duller than I expected, making it hard to stay awake.
Comparative: duller
Superlative: dullest
Duller → The word 'duller' is formed from 'dull' (from Old Norse 'dulll', meaning blunt or not sharp) and the comparative suffix '-er' (meaning more). Thus, 'duller' means more blunt or lacking in sharpness compared to something else.
Think of something that is 'more blunt' or 'less sharp' — that's what 'duller' means.