sackful /ˈsæk.fʊl/noun 2adjective 1forms 4 noun2 •The amount a sack will contain.A sackful of sand won't help the soil here much, but a dump truck full would. •(figurative) A large number or amount (of something).what can the Pope say more for his sackfull of traditions? — 1590 adjective1 •(no longer used) Intent on plunder.Now will I sing the sackfull troopes, Pelasgian Argos held, — 1611 formssackfuls · sacksful · more sackful · most sackful