noun which may take the genitive case particle 'no'
somewhat less; slightly below; on the low side
Used to describe a quantity, amount, or degree that is a little less than a standard or expected level. Often used with nouns like 量, 人数, 塩分, etc.
今日はいつもより客が少なめだ。
There are somewhat fewer customers than usual today.
健康のために塩分を少なめにしてください。
Please go easy on the salt for your health.