1. At the greatest distance.

2. Most distant either in time or place.

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

• furtherd,
• furthert,
• furtherist,
• furthed,
• furthet,
• futhest,
• ferthest,
• fathest,
• furtherst,
• furthist,
• furthast,
• furthrt,
• farthes,
• furdest,
• furthes,
• furtherest,
• furhtest,
• fartherst,
• furest,
• futhet

• farthest,
• Furtick.

The adjective form of the word "furthest" is "farthest".

The plural form of "furthest" is "furthests".

The singular form of the word "furthest" is "further"