topline

1. The upper curvature of a horse's or dog's withers, back, and loin.

2. (attributive, often)Top billing.

3. (attributive, often)The first line, the topmost-ranking line; the most important thing.

   Near-synonyms: (in attributive uses) TLDR, BLUF, bottom-line, bottom line

   topline takeaways

4. The edge that runs along the top of the opening of a shoe.

5. The vocal parts of a piece of music (particularly pop).

regular