1. At the time; at what time; which time; after the time that. When as, at the time when.

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

• whone,
• shen,
• weven,
• twhen,
• whe,
• whaen,
• whenhe,
• thenn,
• whewn,
• swhen,
• whenh,
• whieh,
• wien,
• wheren,
• whoem,
• whorn,
• whant,
• whern,
• wqhen,
• wwek

• whine,
• whiney,
• whim,
• whin,
• Whom,
• wham,
• whinny,
• whiny.

The plural of the "when" can be the "whens".

The singular of the "when" can be the "when".