Definitions

1. noun

a person or thing that moults, or a device used to remove old or worn-out parts from a mold.

“The moulder was used to remove the old casting from the mold.”

2. verb

to remove or shed the outer covering or a part of the body, especially a shell or skin.

“The caterpillar moults to reveal its new form.”

3. verb

to become or make something old-fashioned or out of date.

“The fashion moults quickly, and what’s popular today is not tomorrow.”