Definition of mater in English:

mater

noun

British
dated, informal
  • Mother.

    ‘the mater has kept on the house in London’
    • ‘We visited once, in the 1980s, and I remember being fairly gobsmacked that my mater grew up in such a place.’
    • ‘Doubtless mater and pater sent this horny-handed son of toil to the local comp followed by the polytechnic.’
    • ‘Note that the sender to bed is not named: it could just as easily be a paternal figure as the whimsical mater.’

Origin

Latin.

Pronunciation

mater

/ˈmeɪtə/