What is the meaning of Eller?

Obsolete form of alder.

or

nor

or

or

or

nor

or what?

inflection of el:

1. nominative plural
2. third-person singular predicative of the plural
3. third-person plural predicative of the singular

nominative plural

third-person singular predicative of the plural

third-person plural predicative of the singular

Source: wiktionary.org