modifier
1. [ noun ] (grammar,linguistics) a content word that qualifies the meaning of a noun or verb
Synonyms: qualifier
Related terms: content_word adjective dangling_modifier adverb intensifier phrase
2. [ noun ] a moderator who makes less extreme or uncompromising
Related terms: moderator
3. [ noun ] a person who changes something
Synonyms: changer
Examples:

"an inveterate changer of the menu"

Related terms: person adulterator normaliser standardiser modify
4. [ noun ] (chemistry) a gene that modifies the effect produced by another gene
Synonyms: modifier_gene
Related terms: gene