A slang term coined during the '50s, referring to being in love.
Don: She really makes me laugh and smile a whole lot.

Anna: Ah. You're in the lavender haze.

Don: Yes... I think I'm going to ask her to marry me.
by lav3nd3r August 23, 2009
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"Lavender Haze" was referenced by gay poet James Schuyler (the Pulitzer Prize for Poetry winner of 1981) in his poem "Sunday". There is no official quote from him as to why he used the term "lavender haze", but the color has a long history of being associated with the LGBT+ community.
"Sunday" by James Schuyler

The mint bed is in
bloom: lavender haze
day. The grass is
more than green and
throws up sharp and
cutting lights to
slice through the
plane tree leaves. And
on the cloudless blue
I scribble your name.
by m1dn1ghts October 9, 2022
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Being in a Lavender Haze is a phrase found in the 1950s. It is about being deeply in love with somebody, kind of being oblivious to everything around them that isn't about their crush and/or love interest.

This is also a song with the name Lavender Haze by Taylor Swift about wanting to be in/being in a 'Lavender Haze' (as described by the first definition)
Person 1: Hey, Person 2, have you heard the new TS song, 'Lavender Haze'? What does it mean?
Person 2: It means to be deeply in love!
Person1: Oh! So, you're oblivious to everyone else?
Person 2: You get it now!
by kaworuxshinjisupporter November 13, 2022
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"Lavender Haze" is a fictional term created for the television show Mad Men. It was used to describe the feeling of being in love. Although some claim the term was widely used in the 1950s, there is little to no evidence to support its use in this context before the show.

The example below is a transcript of the scene where it is used. It is from Mad Men Season 2, Episode 12 "The Mountain King", which aired in 2008.
Don: I met a girl.
Anna: Another one?
Don: She's so beautiful and happy. She's a model. And she's from a good family, and she's educated.

Anna: What's her name?
Don: Elizabeth--Betty. I want you to meet her.
Anna: Look at you, you're in the lavender haze!
Don: I just like the way she laughs...and the way she looks at me.
by m1dn1ghts October 9, 2022
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Lavender Haze” is the second single on Montgomery’s second EP “Opal 67”, which was released in December 2021.

According to Montgomery, the song title was inspired by the television show Mad Men, where she'd first heard the term "lavender haze".

When asked what the term means to her, Montgomery said, “Falling in love isn’t always rose coloured. It can get dark and muddied by so many emotions that come up and I feel like that’s the ‘Lavender Haze’.”
Lyrics from Montgomery's "Lavender Haze"

I don’t know what you want me to say
You caught me in a lavender haze
by m1dn1ghts October 9, 2022
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"Lavender Haze" appeared in a poem by Cecil Choi titled "Sleeping Bags", which was published in The Main Review, Vol. 7, No. 3 in September 2021.

The Main Review introduces Choi as a queer, trans, and disabled person of color who enjoys exploring the intersections of their identities in their work.

You can find the poem in its entirety on The Main Review's website.
Lines 3-7 of "sleeping bags" (mentioning lavender haze)

so we listen to the gossamer touch
of our feet on the linoleum floor
echo like a shared secret
and we step out into the lavender
haze of 2 AM.
by m1dn1ghts October 9, 2022
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