We found 2 dictionaries that define the word think'st:

General (2 matching dictionaries)

1. Think'st, think'st, thinkst: Wordnik
2. think'st, thinkst: Wiktionary

Definitions from Wiktionary (Think'st) ▸ verb:  Obsolete form of thinkest. ▸ Words similar to think'st ▸ Usage examples for think'st ▸ Idioms related to think'st ▸ Wikipedia articles (New!) ▸ Words that often appear near think'st ▸ Rhymes of think'st ▸ Invented words related to think'st