A graceful walk/gait

added, thanks

I’d add the indefinite article

Why? It's a dictionary after all.
In reality it can be a/the/someone's

Because it’s not an individual word, but a phrase that describes a character trait. In English, The indefinite is the usual citation form of phrases in translation. We define a mansion, for example, as “a big house.“ Not your/the/my big house. so yes, this is a dictionary, but you’re not translating a word. You’re translating a phrase, and in the English tradition, it should be indefinite outside of any discernible context.

English likes articles and uses them wherever possible.

OK, if you insist, but I still disagree.
E.g. see https://www.lingvolive.com/ru-ru/translate/en-ru/gait >> Словосочетания

The same in the opposite direction: https://www.lingvolive.com/ru-ru/translate/ru-en/походка

Grumbler, it’s not that I insist. But now it reads like a real translation instead of a Runglish definition.