hereby UK /hɪəˈbʌɪ/US /hɪɹˈbaɪ/ adverb2 •(formal) By this means, action or process.I hereby declare you husband and wife. •(no longer used) Near this place; nearby.There is a mighty man, which wonnes hereby, / That with most fell despight and deadly hate / Seekes to subvert her Crowne and dignity […]. — 1596