cer ‧ ti ‧ tude /ˈsɜːtətjuːd, ˈsɜːtɪtjuːd $ ˈsɜːrtətuːd/ BrE AmE noun [uncountable]
[ Date: 1400-1500 ; Language: Late Latin ; Origin: certitudo , from Latin certus ; ⇨ ↑ certain 1 ]
formal the state of being or feeling certain about something SYN certainty