This may be my favorite semi-wordy definition of a sustainable food system.
From the 2025 Vision Statement for Michigan Food and Farming:
Sustainability as it applies to food means that societies pass on to future generations all the elements required to provide healthy food on a regular basis: healthy and diverse environments (soil, water, air, and habitats); healthy, diverse, and freely reproducing seeds, crops, and livestock; and the values, creativity, knowledge, skills, and local institutions that enable societies to adapt effectively to environmental and social changes.
Biodiversity, knowledge & skills, ecosystem health, strong communities, self-replication across generations, and the ability to adapt. The inclusion of creativity is particularly rare—as our surrounding and systems change, we do need to be creative to maintain healthy systems. Growers, cooks, bankers, lawyers, and politicians all need to be able to think within and also outside “the box” in order to adapt to new conditions. My only complaint is that it does not explicitly include economic sustainability, although you could easily argue that the last section could include fairly valuing the work of those who work in our food system.