1. Belonging to some prior time
   "erstwhile friend"
   - former, old, onetime, one-time, quondam, sometime

1. At a previous time
   "her erstwhile writing"
   - once, formerly, at one time, erst [archaic], sometime [archaic]

See also: past

Encyclopedia: Erstwhile

• projector
• prokaryote
• prokaryotic
• Prokayotae
• Prokhorov
• Prokofiev
• prolactin
• prolamine
• prolapse
• prolapsus
• prolate
• prolate cycloid
• prole
• proleg
• prolegomenon
• prolepsis
• proletarian
• proletariat
• proletariate
• proliferate
• proliferation
• proliferous
• prolific
• prolificacy
• prolifically