The word "lump" means a small, solid piece of something. It can also refer to a swelling or bump on the body, or to grouping things together as a whole. Full definition
You can set a price for each impression, meaning the number of times a visitor sees your advertiser's ads, but the common method of selling impressions is in lumps of 1,000. (entrepreneur.com)
The benefits are paid as lump sum amount which remains constant throughout the policy period. (comparepolicy.com)
However, if another loan seems to be the problem, might have to get a cosigner, or reduce your debt with lump sum payments. (autoloansolutions.ca)