countersign
verb /ˈkaʊntəsaɪn/
  /ˈkaʊntərsaɪn/
 (specialist)Verb Forms
| present simple I / you / we / they countersign |    /ˈkaʊntəsaɪn/   /ˈkaʊntərsaɪn/  | 
| he / she / it countersigns |    /ˈkaʊntəsaɪnz/   /ˈkaʊntərsaɪnz/  | 
| past simple countersigned |    /ˈkaʊntəsaɪnd/   /ˈkaʊntərsaɪnd/  | 
| past participle countersigned |    /ˈkaʊntəsaɪnd/   /ˈkaʊntərsaɪnd/  | 
| -ing form countersigning |    /ˈkaʊntəsaɪnɪŋ/   /ˈkaʊntərsaɪnɪŋ/  | 
- countersign something to sign a document that has already been signed by another person, especially in order to show that it is legally or officially acceptable
- All orders must be countersigned by one of the directors.
 
Word Originlate 16th cent. (as a noun): from French contresigner (verb), contresigne (noun), from Italian contrassegno, based on Latin signum ‘sign’.