Definition of racerback in English:

racerback

Pronunciation /ˈrāsərˌbak/ /ˈreɪsərˌbæk/

noun

as modifier
  • Denoting an article of clothing with a T-shaped back behind the shoulder blades to allow ease of movement in sports.

    ‘a racerback tee’
    • ‘Some dancers make their own alterations to make their leotard more appealing - cut the back, pinch the neckline, turn tanks into racerbacks, and even use dye to get the perfect color.’
    • ‘Larger breasted women usually prefer racerbacks or T-backs because they offer more support.’
    • ‘Also, consider racerback tops with a high Lycra content, as they are the most comfortable and supportive for larger bust sizes.’