# MRS

/ˈmɪsɪz/ (US)

Source: https://englishreference.com/word/mrs
Updated: 2026-08-08

## Senses

### 2. wife or girlfriend

noun · CEFR B2 · Informal · Slang

A casual way to talk about your wife or long-term female partner.

For teachers: A colloquial or slang term referring to one's wife, girlfriend, or female romantic partner.

- I need to check with the mrs before I agree to go out tonight.
- He joked that he had to consult the mrs before making any major financial decisions regarding their shared savings.

Usage: Usually preceded by the definite article 'the'.

Teaching tip: This can sound slightly old-fashioned or overly casual; some may find it slightly disrespectful depending on the tone.

### 3. medical imaging

noun · CEFR C2 · Technical

Stands for Magnetic Resonance Spectroscopy. A special medical test that looks at chemicals in the body.

For teachers: Abbreviation for Magnetic Resonance Spectroscopy. A non-invasive analytical technique used to study metabolic changes in body tissues.

- The doctor ordered an MRS to get more detail about the brain tumor.
- Advanced MRS techniques allowed the researchers to quantify metabolite concentrations within the localized region of the patient's frontal lobe.

Usage: Often used in conjunction with MRI (Magnetic Resonance Imaging).

### 4. economics term

noun · CEFR C2 · Academic · Technical

Stands for Marginal Rate of Substitution. A term in economics about how much of one thing a person will trade for another.

For teachers: Abbreviation for Marginal Rate of Substitution. The rate at which a consumer is willing to give up one good in exchange for another while maintaining the same level of utility.

- In our economics class, we calculated the MRS for coffee and tea.
- The indifference curve's slope represents the MRS, illustrating the trade-offs a consumer makes between two competing commodities.

## Examples

- I need to check with the mrs before I buy a new car.
- He spent the whole weekend at home helping the mrs with the gardening.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.