Bible Dictionary · G
Glean
The corners of fields were not to be reaped, and the sheaf accidentally left behind was not to be fetched away, according to the law of Moses (Lev 19:9; Lev 23:22; Deut 24:21). They were to be left for the poor to glean. Similar laws were given regarding vineyards and oliveyards. (Comp. Ruth 2:2.)
From Easton’s Bible Dictionary (1897), by Matthew George Easton.