1. Going or moving backward; apparently moving backward, and contrary to the succession of the signs; declining from a better to a worse state.

2. To go or move backward.

3. To cause to go backward.

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

• retrograd,
• eetrograde,
• detrograde,
• fetrograde,
• tetrograde,
• 5etrograde,
• retrograse,
• retrograds,
• retrogade,
• retrogrde,
• retrogarde,
• retrograed,
• retrogrede,
• retrograte,
• Retrocade,
• retrogradez,
• retrograthy,
• retroserate,
• Orathograde,
• Cetrigrade

• retroactive,
• retrogress,
• retractor,
• retractable,
• retraction,
• retrogressive,
• retrace,
• retracted,
• retract,
• retrousse,
• retractile,
• retrogression.

The adverb form of "retrograde" is "retrogradely".

The adjective form of the word "retrograde" is "retrograde".

The plural form of the word "retrograde" is "retrogrades"

The singular form of the word "retrograde" is "retrograde". The word itself is an adjective that describes something moving or directed backward or tending to move in a reversed direction. The plural form remains the same.