Definition of nulli secundus in English:
nulli secundus
(also nulli secundum)
adjective ˌnʌli sɪˈkʌndəs
Pre-eminent; second to none.
Origin
Mid 18th century; earliest use found in Henry Fielding (1707–1754), author and magistrate. From classical Latin nūllī secundus second to none from nūllī, dative of nūllus no + secundus.