English Reference

Word

mater

US/ˈmætɝ/

UK/mˈeɪtɐ/

Definitions

01mother

C2

n. an old-fashioned and slightly funny way to say 'mother'.

n. a colloquial and now largely archaic term for one's mother, typically associated with upper-class British English.

“He wrote a long letter to his mater while he was away at boarding school.”

“In the early twentieth-century novel, the protagonist frequently referred to his mater with a mixture of affection and formal distance.”

British English · Humorous · Archaic · Slang

Teaching tip

This sense is almost exclusively found in period literature or used ironically today; learners should avoid using it in modern conversation.

Synonyms

Antonyms

pater

02brain membrane

C2 · Medicine

n. one of the three layers of tissue that cover and protect the brain.

n. any of the three membranes (dura mater, arachnoid mater, and pia mater) that envelop the brain and spinal cord.

“The doctor explained that the infection had reached the dura mater.”

“The surgeon carefully retracted the pia mater to access the underlying neural tissue during the delicate procedure.”

Technical

Usage

Usually appears as part of a compound term like 'dura mater' or 'pia mater'.

Synonyms

meninxmembrane

03one who mates

C1 · Science

n. a person or animal that joins with another to have babies or to work together.

n. an organism or agent that performs the act of mating.

“The researcher observed that the strongest mater in the group had the most offspring.”

“In this specific species of bird, the primary mater often travels long distances to find a suitable nesting site.”

Technical

Synonyms

Real-World Examples

“He cut ties with the University of Kentucky, his alma mater, after the school accepted $7m for a new basketball dormitory from a group of donors organized by a coal company president.”
The Guardian · 1 Sept 2026
“These schools admitted and trained Presbyterians who, as adults, became the rank and file of their congregations – and, as alumni, donated to their alma maters.”
The Conversation · 4 Aug 2026

Etymology

From Latin māter (“mother”), partly via Late Middle English matere. Doublet of mata and mother. Ancestor of matrix.

From mate + -er.

See 'mater.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Domains

AnatomyBiology

This entry

Level
C2 · Proficiency
Frequency
Frequent
Updated

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