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Meaning of life partner
A person with whom one shares a close personal relationship, especially a romantic relationship.
Etymology of life partner
The term "life partner" originated in the mid-20th century as a way to describe a romantic partner with whom one shares a life, without the formalization of marriage.
   The phrase gained popularity in the 1980s and 1990s, particularly among same-sex couples who were denied the right to marry in many jurisdictions.
Synonyms
                                                spouse
                                                                        partner
                                                                        significant other
                                                                        companion
                                                                        mate
                                                                        husband
                                                                        wife
                                                                        boyfriend
                                                                        girlfriend
                                                                        fiancé
                                                                        fiancée
                                                                        soulmate
                                                                        better half
                                                                        consort
                                                                        helpmate
                                                                        associate
                                                                        colleague
                                                                        friend
                                                                        confidant
                                                                        ally
                                                                        companion
                                                                        associate
                                                                        collaborator
                                                                        helper
                                                                        supporter
                                                                        lover
                                                                        sweetheart
                                                                        darling
                                                                        beloved
                                                                        loved one
                                                                        intimate
                                                                        familiar
                                                                        colleague
                                                                        cohabitant
                                                                        housemate
                                                                        roommate
                                                                        flatmate
                                                            
            Definitions
- A person with whom one has a long-term romantic relationship, often but not necessarily with the intention of getting married.
- * A person who is one's closest companion, often sharing financial and domestic responsibilities.
Usage Examples
- My life partner and I have been together for over a decade.
- * She is my life partner, and I couldn't imagine spending my life with anyone else.
- * The couple, who have been life partners for many years, finally got married last year.