designatum

For Bedeutung, writers have used the terms reference, referent, meaning, extension, denotation, nominatum, and designatum.

Thus if it does not make sense to suppose that the designatum of "A" might be different from what it is, then "A" is a rigid designator, otherwise it is non-rigid.

Generally every 2nd or 3rd person verb, pronoun, postposition or possessed noun must be marked honorifically if its subject or object, designatum, object or possessor (respectively) is a living adult (the speaker's wife or adult children being exceptions).