resistant meaning
ENFR résistant 
- NounPLresistantsPREré-SUF-ant
- A person who resists; especially a member of a resistance movement.
- A thing which resists.
- A person who resists; especially a member of a resistance movement.
- AdjectiveCOMmore resistantSUPmost resistant
- Which makes resistance or offers opposition.
- Which is not affected or overcome by a disease, drug, chemical or atmospheric agent, extreme of temperature, etc.
- The infection is resistant to antibiotics.
- (statistics) Not greatly influenced by individual members of a sample.
- Which makes resistance or offers opposition.
- More Examples
- Used in the Middle of Sentence
- The problem has been augmented by the increasing prevalence of nonalbicans species that are often resistant to fluconazole and AMB.
- The secondary resistant IB128 cell line was also characterized by an unbalanced pentaploidy of the short arm of chromosome 17 including the TP53 gene.
- Like the spores of other bacteria, when compared to vegetative cells, akinetes are more resistant to environmental stresses.
- Used in the Middle of Sentence
Definition of resistant in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Nouns
- Countable nouns
- Countable nouns
- Adjectives
Source: Wiktionary
Grammatically, this word "resistant" is an adjective. It's also a noun, more specifically, a countable noun.