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

• Sialis
• Sialis lutaria
• sialolith
• Siam
• siamang
• siamese
• Siamese cat
• siamese connection
• Siamese twin
• Sian
• sib
• Sibelius
• Siberia
• Siberian
• Siberian crab
• Siberian crab apple
• Siberian elm
• Siberian husky
• Siberian larch
• Siberian millet
• Siberian pea tree
• Siberian spruce
• Siberian wall flower
• sibilant
• sibilant consonant