- Rendering null and void; conditionally invalidating. - Irritating; producing irritation or inflammation.
2 . Irritant
[ n.]
- That which irritates or excites. - Any agent by which irritation is produced; as, a chemical
irritant; a mechanical or electrical irritant. - A poison that produces inflammation.
Meaning of 'irritant' (Princeton's WordNet)
1 . irritant
[ n]
Meaning (1): - something that causes irritation and annoyance