Neuter is a Latin adjective meaning "neither", and can refer to:

• Neuter gender, a grammatical gender, a linguistic class of nouns triggering specific types of inflections in associated words
• Neuter pronoun
• Neutering, the sterilization of an animal

• Trap–neuter–return (TNR), an alternative to euthanasia for managing feral cat and dog populations
• UCAN Spay Neuter Clinic, non-profit organization providing spay/neuter as a solution to pet overpopulation
• Neuters, a musical album
• Neuter whose
• Neutra, a surname
• Neutral (disambiguation)
• Neutrino, a nearly massless, electrically neutral subatomic particle
• Neutrogena, a line of cosmetic products
• Neutron, an electrically neutral subatomic particle
• Jimmy Neutron, a cartoon series
• Nutter (disambiguation)