father-in-law
B1Neutral to Formal. The full compound is standard; informal contexts often use just "father" after initial introduction or use the person's first name.
Definition
Meaning
The father of one's spouse.
A man who has a formal familial relationship to someone by virtue of that person's marriage to his child; can also be used loosely or humorously to refer to an older male authority figure in a non-familial context.
Linguistics
Semantic Notes
Refers to a relationship established by marriage, not by blood. Plural is "fathers-in-law". The term implies a formal, respectful relationship, though the actual closeness varies culturally and individually.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Both varieties use the same term. Informal shortening to "father" is common in both.
Connotations
Similar connotations of respect and formality. In both cultures, the relationship can range from very close and friendly to distant and formal.
Frequency
Equally common and standard in both dialects.
Vocabulary
Collocations
Grammar
Valency Patterns
[Possessive Pronoun] + father-in-law + [Verb]Father-in-law + of + [Personal Pronoun]to have a [Adjective] father-in-lawVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Father-in-law suite (a separate living area in a house)”
- “To be on good terms with one's father-in-law”
Usage
Context Usage
Business
Rare. Might appear in discussions of family businesses, nepotism policies, or leave for family events.
Academic
Rare. Primarily in anthropological, sociological, or legal texts discussing kinship systems.
Everyday
Very common in personal and family discussions, introductions, and social planning.
Technical
Used in legal contexts (e.g., wills, next-of-kin definitions) and formal genealogy.
Examples
By Part of Speech
verb
British English
- He's been father-in-lawed by the happy couple.
- One doesn't simply get father-in-lawed; it's a process.
American English
- I'm about to be father-in-lawed next weekend.
- He felt officially father-in-lawed after the wedding.
adverb
British English
- He nodded father-in-lawly from his armchair.
- She was treated rather father-in-lawly by the old gentleman.
American English
- He shook my hand father-in-lawly, with a firm grip.
- He advised me father-in-lawly about investing.
adjective
British English
- He offered some father-in-lawly advice on home repairs.
- Their relationship had a comfortable, father-in-law quality.
American English
- He has a great father-in-law relationship with his daughter's husband.
- She appreciated his father-in-law support during the move.
Examples
By CEFR Level
- My father-in-law is very kind.
- We visit my father-in-law on Sundays.
- His father-in-law lives in Manchester.
- I get along very well with my father-in-law.
- My father-in-law is going to help us paint the house.
- Her father-in-law taught her how to fish.
- Despite initial reservations, my father-in-law and I have developed a mutual respect.
- My father-in-law, a retired engineer, offered invaluable advice on the renovation plans.
- Negotiating family holidays can be tricky, especially with both sets of fathers-in-law expecting a visit.
- The dynamics of the father-in-law and son-in-law relationship have been a subject of cultural comedy for centuries.
- Upon his father-in-law's sudden passing, he assumed responsibility for the family's small business.
- Anthropologists note that the prescribed behaviour towards a father-in-law varies dramatically across patrilineal and matrilineal societies.
Learning
Memory Aids
Mnemonic
Think: The law (marriage) makes him your FATHER. He is your father 'in the eyes of the law'.
Conceptual Metaphor
FAMILY IS A LEGAL CONTRACT (The '-in-law' suffix conceptualizes familial ties created through legal union).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate as "отчим" (stepfather). "Father-in-law" is свёкор (husband's father) or тесть (wife's father). Russian lacks a single, gender-neutral term for the parent of a spouse.
- The plural "fathers-in-law" refers to multiple such relations (e.g., both your spouse's father and your sibling's spouse's father), not multiple husbands of one mother-in-law.
Common Mistakes
- Incorrect plural: *father-in-laws (correct: fathers-in-law).
- Confusing with 'stepfather' (a parent by remarriage, not by one's own marriage).
- Using incorrect possessive: *the father of my wife (awkward but understandable) is less common than 'my wife's father' or 'my father-in-law'.
Practice
Quiz
What is the correct plural form of 'father-in-law'?
FAQ
Frequently Asked Questions
Traditionally, yes. For long-term unmarried partners, terms like 'partner's father' are more common, though some may use 'father-in-law' informally, especially in commitment ceremonies or common-law marriages.
This depends entirely on the family's customs and the individuals' preferences. Many people use first names. Using 'father' or 'dad' is common and often a sign of closeness, but it should be mutually agreed upon to avoid discomfort.
A stepfather is married to your mother (a parent by your parent's remarriage). A father-in-law is the father of your spouse (a relation by your own marriage). They belong to different kinship categories.
If you are on formal terms, use his title and surname (e.g., Mr. Smith). If you are closer, using his first name is standard. The salutation would follow accordingly (Dear Mr. Smith / Dear John).