What's the difference between gleg and glew?

Gleg

Definition:

• (a.) Quick of perception; alert; sharp.

Example Sentences:

Glew

Definition:

• (n.) See Glue.

Example Sentences:

• (1) In 6 patients we have implanted through an inguinal approach 7 prostheses consisting of silicone rubber made at VEB "August Apfelbaum" Neustadt-Glewe.