Sens 1 :a doubt about meaning: a situation in which
something can be understood in more than one way and it is not clear which meaning
is intended.[source : D'après ENC]
Candidates for artifact washes should be exceptional in depositional
and recovery context, anything less only furthers the ambiguity of
interpretation.
Ambiguity may arise when multiple terms are used to mean the same
thing, or when one term is used with multiple meanings (synonym, anonyms,
is-a relation, part-of relation, and location).
Ontology is a formal definition of the domain and annotation based on
ontology, by removing ambiguity from definition, makes integration between
different sources of information possible.