| Main Entry: | hallmark |
| Part of Speech: | noun |
| Definition: | symbol, authentication |
Synonyms: |
badge, certification, device, emblem, endorsement, indication, mark, ratification, seal, sign, signet, stamp, sure sign, telltale sign, trademark |
| Main Entry: | dead giveaway |
| Part of Speech: | noun |
| Definition: | obvious clue |
Synonyms: |
betrayal, communication leak, exposure of secret, giveaway, leak, telltale, telltale sign, unintentional disclosure, unwitting disclosure |