Longman Dictionary of Contemporary English
Wikipedia
A scoop neck shirt is one in which the scoop-shape neckline is dropped significantly below normal limits. Some scoop neck shirts, when worn by women, are cut low enough to display significant amounts of cleavage. These shirts come in a variety of forms, including those with and without buttons. At least one fashion designer has recently produced a line of shirts for men that can be converted to scoop neck shirts by clipping a thread in the collar. The scoop neck shirt is often worn as sports or casual wear by women, and has grown increasingly fashionable for men.
The exact shape of the neckline may vary from a slightly exaggerated circle to extremely severe parabolae, with limitless variation between.
Usage examples of "scoop neck".
She handed me a black silk shirt with a scoop neck and little buttons down the back.
She had on a black shift of some sort with no sleeves and a scoop neck that quit where it started to get interesting.
I got up and took another shower, since the red mark was still there, and I couldn't wear the scoop neck.
The next night there's a knock on my door and I'm wearing my best dress, with a scoop neck, and it shows my cleavage pretty good and on the way to the door I suddenly doubt myself.
I loved the simplicity of her appearance, her white cotton scoop neck blouse with its simple short sleeves and the necklace of black beads around her neck.
Rick had stuck close to her side on the way down from the Residence, making small talk, absolutely not looking at the top's scoop neck.
She was dressed in a pink cotton-knit tunic-style dress with scoop neck and long sleeves that were rolled up.
It had a low scoop neck showing an acre of cleavage and it was tucked into a matching spandex miniskirt.