Definitions

1. adjective

Having a strong or unpleasant smell

“The smellier the cheese, the more flavorful it is.”

2. comparative

Comparing two things, with the first being stronger or more unpleasant in smell than the second

“This smellier gas is causing more pollution than the other.”

3. superlative

Comparing three or more things, with the first being the strongest or most unpleasant in smell

“This smellier of the two gases is causing more environmental problems.”