minimum bounding box

the smallest enclosing rectangle aligned to the horizontal axis within which all the points of a shape lie. For components which wrap onto multiple lines as part of a sentence or block of text (opens in a new tab) (such as hypertext links), the bounding box is based on how the component would appear on a single line.

Source: WCAG 2.2 definition of “minimum bounding box” (opens in a new tab) (W3C)