1. from that time forward; from then on
Usage: formal; literary

Examples

• The treaty was signed in 1945, and thenceforward the two nations remained allies.
• She graduated from college and thenceforward devoted herself to medical research.
• The company changed its policy in January and thenceforward required all employees to work remotely.
• He inherited the estate at age twenty-one and thenceforward managed it himself.
• The law took effect immediately and thenceforward applied to all new construction.
• After the accident, she walked with a cane and thenceforward avoided driving at night.