D defs.my
Entry 1 sense Webster, 1913

Henceforth

/hĕn'-sfôrth'/ · Hence·forth · IPA /hɛnsˈfɔɹθ/
01 adv. From this time forward; henceforward.
  1. 1.
    From this time forward; henceforward.
    “I never from thy side henceforth to stray.” Milton.