1. Objects or ideas that have been procured or amassed over a period of time; especially, when they form a collection or a comprehensive whole: Jim and Jane had many valuable gleanings for their project after spending long hours of research at the university.

From the gleanings of endless research, biochemists have made many discoveries that are of significant benefit to the human race.

2. The usable parts of a crop that are left behind in a harvested field or area and which can be gathered in by hand: Jim, the farmer, hired workers to collect the gleanings of wheat that were left after using his reaping machine.