signu
Signu is a term that currently has no widely recognized meaning in major reference works. There is no established encyclopedia article for Signu, and its usage appears to be context-dependent or informal in absence of reliable sources.
Because Signu can potentially function as a misspelling, a transliteration, a proper noun in a local language,
If you can provide the intended context for Signu, I can draft a concise, wiki-style entry tailored
Alternatively, if Signu is meant as a placeholder or you want a generic stub until sources are