Learner's definition of MONTH
1 [count] : any one of the 12 parts into which the year is divided
July is my favorite month.
It was hard to keep warm in the cabin during the winter months.
the merry month of May
The payments are due (on) the third of the month. [=on the third day of every month]
We visit them twice a month. [=two times every month]
I saw her last month and I'll see her again next month.
The price changes from month to month. = The price changes each/every month.
The price sometimes changes dramatically from one month to the next.
His health has been getting better month by month. = His health has been getting better with each passing month. [=his health has been getting better in a gradual and steady way as months have passed]
These problems have continued month after month. [=for several or many months]
2 [count] : a period of time that lasts about four weeks or 30 days
The baby is four months old. [=a four-month-old baby]
a pregnant woman who is in her eighth month = a woman who has been pregnant for eight months
He was gone for a month.
She was back to work a month after the accident.
I'll be seeing her again in a month. = I'll be seeing her again a month from now. = I'll be seeing her again in a month's time.
3 months [plural] : a long period of time that is less than a year
a month of Sundaysinformal
of the month
: chosen for special honors or attention during a particular month
— see also flavor of the month at 1flavor