Definition of somewhen in English:
 somewhen
adverb ˈsʌmwɛnˈsəmˌ(h)wen
informal At some time.
 somewhen between 1918 and 1930
 Example sentencesExamples
-  And about bluebottles, pink-tongues and all sorts of colourful things, we'll have more to report, someday, sometime, somewhen in Sandy Beach Almanac.
 -  Don't die without finding it, somewhere, somewhen.
 -  Somewhere, somewhen, there was a sea change in the American mind.
 -  He was looking forward to a leap into another life, somewhere and somewhen else.
 -  I'll stick my head in somewhen and take a look.