Definition of aletaster in English:

aletaster

Pronunciation /ˈeɪlteɪstə/

noun

historical Scottish
  • An officer appointed to test the ale brewed (and sometimes the bread baked) in a particular area.

    The office still exists (or has been revived) in a number of English towns and villages, on a largely ceremonial basis.

Origin

Late Middle English; earliest use found in Acts of Parliament of Scotland. From ale + taster.