1. flatten - Adjective
2. flatten - Verb
To reduce to an even surface or one approaching evenness; to make flat; to level; to make plane.
To throw down; to bring to the ground; to prostrate; hence, to depress; to deject; to dispirit.
To lower the pitch of; to cause to sound less sharp; to let fall from the pitch.
To become or grow flat, even, depressed dull, vapid, spiritless, or depressed below pitch.
Source: Webster's dictionaryThe landscape flattened Source: Internet
flatten a road Source: Internet
flatten your stomach with these exercises Source: Internet
A cube has eleven nets (one shown above): that is, there are eleven ways to flatten a hollow cube by cutting seven edges. Source: Internet
A., my partner, and I are both wearing Adidas face masks, doing our part to help flatten the curve. Source: Internet
“Any death is a tragedy, and we are doing our best to try and flatten the curve of COVID-19 in prisons,” Todd Ishee, state commissioner of prisons, said in a statement. Source: Internet