Less is often considered to be the comparative form of little.
1 det You use less to indicate that there is a smaller amount of something than before or than average. You can use `a little', `a lot', `a bit', `far', and `much' in front of less.
DET n-uncount (Antonym: more)
People should eat less fat to reduce the risk of heart disease., ...a dishwasher that uses less water and electricity than older machines...
Less is also a pronoun., pron (Antonym: more)
Borrowers are striving to ease their financial position by spending less and saving more.
Less is also a quantifier., quant QUANT of def-n-uncount/sing (Antonym: more)
Last year less of the money went into high-technology companies...
2 prep-phrase You use less than before a number or amount to say that the actual number or amount is smaller than this.
Motorways actually cover less than 0.1 percent of the countryside..., Less than a half hour later he returned upstairs.
3 adv You use less to indicate that something or someone has a smaller amount of a quality than they used to or than is average or usual.
ADV adj/adv, ADV of a n (Antonym: more)
Other amenities, less commonly available, include a library and exercise room..., Poverty is less of a problem now than it used to be.
4 adv If you say that something is less one thing than another, you mean that it is like the second thing rather than the first.
ADV group than group/cl
At first sight it looked less like a capital city than a mining camp...
5 adv If you do something less than before or less than someone else, you do it to a smaller extent or not as often.
ADV with v (Antonym: more)
We are eating more and exercising less..., I see less of any of my friends than I used to.
6 phrase You use the expressions still less, much less, and even less after a negative statement in order to introduce and emphasize a further statement, and to make it negative too.
FORMAL, emphasis I never talked about it, still less about her..., The boy didn't have a girlfriend, much less a wife.
7 prep When you are referring to amounts, you use less in front of a number or quantity to indicate that it is to be subtracted from another number or quantity already mentioned.
(=minus) (Antonym: plus)
...Boyton Financial Services Fees: £750, less £400..., Company car drivers will pay between ten and twenty five percent, less tax.
8 You use less than to say that something does not have a particular quality. For example, if you describe something as less than perfect, you mean that it is not perfect at all.
less than phrase PHR adj/adv (emphasis)
Her greeting was less than enthusiastic..., Her advice has frequently been less than wholly helpful.
9 You use no less than before an amount to indicate that the amount is larger than you expected.
no less than phrase PHR amount (emphasis)
No less than 35 per cent of the country is protected in the form of parks and nature sanctuaries..., He is lined up for no less than four US television interviews.
couldn't care less →
more or less →
-less is added to nouns in order to form adjectives that indicate that someone or something does not have the thing that the noun refers to. suffix
...drink and talk and meaningless laughter..., He is not as friendless as he appeared to be.