Abbott-Smith Manual Greek Lexicon
κράτιστος (G2903)
4 κράτιστος , -η, -ον , superl. of κρατύς (Hom.), strongest , mightiest (Hom.). noblest , best (cf. κρείσσων ), most excellent (Pind., Soph., al.): voc., κρατίστε , as title of honour and respect ( DCG , ii, 727 a ), Lk 1:3 , Ac 23:26 24:3 26:25 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain