Definition of erst in English:

erst

adverb

Archaic
  • Long ago; formerly.

    ‘the friends whom erst you knew’
    • ‘Guide me, who erst trod so daintily the streets of Troy, but now am but a slave.’
    • ‘Here sleeps the Man, who erst denied mean self.’
    formerly, previously, in the past, at one time, at one point, once upon a time, on a former occasion, on one occasion, one time, in one case, time was when, in days gone by, in times gone by, back in the day, in times past, in the old days, in the good old days, long ago
    View synonyms

Origin

Old English ǣrest, superlative of ǣr (see ere).

Pronunciation:

erst

/ərst/