moulding

noun
UK /ˈməʊldɪŋ/
US /ˈmoʊldɪŋ/

A moulding is a long, thin strip of wood or plastic that decorates a wall or edge.

The carpenter added a wooden moulding around the door frame.


OTHER MEANINGS

2. The process of shaping something soft into a particular form.

The moulding of clay into pots takes skill.

3. Something that has been shaped in a mould.

The jelly was set in a fancy moulding.

4. In British English, a soft, fluffy growth of mould on old food.

There was moulding on the bread in the cupboard.