He would be wearing a mask with a closed mouth, because his art consisted not of words but of movement.

Conduct books made it clear that the closed mouth was the proper civilised demeanour.

In particular, she said, you need to understand their 'closed mouth' communications, in which a number of species use internal air pouches to make vibrations.

Pointed toes and closed mouth also assist in a smooth jump.

After hulling and drying, pistachios are sorted according to open mouth and closed mouth shell.