Any process that stops, prevents or reduces the frequency, rate or extent of mitotic spindle elongation.
Synonyms:
exact_synonym:
down regulation of mitotic spindle elongation; down regulation of spindle elongation during mitosis; downregulation of mitotic spindle elongation; downregulation of spindle elongation during mitosis; negative regulation of spindle elongation during mitosis
narrow_synonym:
inhibition of mitotic spindle elongation; inhibition of spindle elongation during mitosis