Yesterday

/ˈjɛstərˌdeɪ/

Meaning & Definition

noun

The day before today.

I went to the store yesterday.

A time in the past, often referring to a recent event.

Yesterday's meeting was very productive.

The day before a specified day.

Yesterday was New Year's Eve.

adverb

On the day before today.

I finished my project yesterday.

At a time in the past, often not fixed.

We talked about it yesterday.

Middle English: from the phrase 'yester day', meaning 'the day before'.

back in the day:

Referring to a time in the past that is nostalgic or significant.

yesterday's news:

Information that is no longer relevant or outdated.

yesterday is gone:

Indicating that something from the past cannot be changed.

A reference to something outdated or no longer relevant.

That idea is so yesterday!

Used to express that something is from a previous time and not in style anymore.

Her outfit is totally yesterday.