- a mullion or muntin.
Origin of munnion
Examples from the Web for munnion
Historical Examples of munnion
Miss Munnion said that she had often observed it, and that it was very true.
Of course Diana ought to come before everything, and yet Miss Munnion did not seem able to make up her mind to go to her.
She had not to wait long, for Miss Munnion reappeared in less than five minutes shaking her head mournfully.
- an archaic word for mullion