Pinchbeck doesn't seem to be mad, at least not in the conventional meaning of the term.

It sometimes does the same with conventional meanings too.

But his use of numbers is entirely without conventional meaning.

The form in which meaning is dealt with is that of conventional meanings.

Interpreting a verse in a sense very different from its conventional meaning:

The conventional meanings assigned to plays made by the defenders in order to exchange information.

Some phrases have obtained a conventional meaning which the testators who used them probably did not dream of.

The term can take on specific conventional meanings in the grammars of particular languages.

Doubles are sometimes given conventional meanings in otherwise mostly natural systems.

The conventional meanings attached to various bids, above, are likely to be forgotten.