Definitions

1. noun

a person who applies something, such as a paint or a coat of varnish

“The applier of the new floor finish received praise for the work.”

2. verb

to apply something, such as a coat of paint or varnish

“The contractor will applier the new finish to the entire room.”

3. verb

to put something into effect or use

“The new policy will applier from January 1st.”