the world > space > shape > unevenness > projection or prominence > protuberance or rounded projection > [noun] > making or becoming protuberant (8)
A swelling or bulging out.
The bellying, bulging, or swelling of a sail, a net, etc.
The action of the verb bag in different senses. Bulging; hanging in slack folds.
The action of sack, v.1, in various senses.
A becoming protuberant, swelling out.