Yesterday Definition

yĕstər-dā, -dē

yesterdays

noun

The day before today; day just past.

Webster's New World

A recent day or time.

Webster's New World

Time gone by.

Webster's New World

Synonyms:

Antonyms:

adverb

On or during the day before today.

Webster's New World

A short while ago.

American Heritage

Recently.

Webster's New World

As soon as possible.

I want this done yesterday!

Wiktionary

adjective

Of yesterday.

Yesterday morning.

Webster's New World

Other Word Forms of Yesterday

Singular:

yesterday

Plural:

yesterdays

Middle English from Old English geostran dæg geostran yesterday yester– dæg day day

From American Heritage Dictionary of the English Language, 5th Edition
Old English geostran (“yesterday"), from Proto-Germanic *gestra-, from Proto-Indo-European *dʰǵʰyes-;

From Wiktionary
Old English dæg, from Proto-Germanic *dagaz, from Proto-Indo-European *dÊ°egÊ°- (“to burn")

From Wiktionary