1. Formerly; till now.

2. Past time.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• herefore,
• heretofor,
• geretofore,
• beretofore,
• neretofore,
• jeretofore,
• ueretofore,
• yeretofore,
• hwretofore,
• hsretofore,
• hdretofore,
• hrretofore,
• h4retofore,
• hertofore,
• heretofoe,
• heertofore,
• Himenophore,
• seratoforn,
• hereto ffore,
• here tofor

• heartbreak,
• heart failure,
• heartfelt,
• heartbreaking.

The adjective form of the word "heretofore" is "heretofore". The word itself can be used as both an adverb and an adjective.

The plural form of "heretofore" is "heretofores".

The singular form of the word "heretofore" is "heretofore". It is already in singular form and does not change when referring to a single entity or object.