used in formal language or for emphasis before hundred, thousand, etc., or before a unit of measurement
یک
It cost one hundred and fifty pounds.
He lost by less than one second.
3
A1
used for emphasis to mean ‘a single’ or ‘just one’
یک, تنها, فقط یک
There's only one thing we can do.
4
A1
a person or thing, especially when they are part of a group
یک, نفر, یکی, کسی
One of my friends lives in Brighton.
One place I'd really like to visit is Bali.
5
A1
used for emphasis to mean ‘the only one’ or ‘the most important one’
یگانه, تنها, یکدانه, بیهمتا, منحصر به فرد, بیمانند, یکتا, تک
He's the one person I can trust.
Her one concern was for the health of her baby.
It's the one thing I can't stand about him.
6
A1
used when you are talking about a time in the past or the future, without actually saying which one
یک زمانی, یک وقت, زمانی, روزی, وقتی
I saw her one afternoon last week.
One day you'll understand.
7
A1
the same
یکسان, همان
They all went off in one direction.
8
used for emphasis instead of a or an
یک, یه
That was one hell of a game!
She's one snappy dresser.
9
used with a person’s name to show that the speaker does not know the person
فلان, یک نفر, کسی
He worked as an assistant to one Mr Ming.
synonym certain(5)
pronoun
A1
1
A1
used to avoid repeating a noun, when you are referring to somebody/something that has already been mentioned, or that the person you are speaking to knows about
یکی
2
A1
used when you are identifying the person or thing you are talking about
یکی, آن یک, آن یکی, آن شخص, آن فرد
Our house is the one next to the school.
The students who are most successful are usually the ones who come to all the classes.
3
A1
a person or thing belonging to a particular group
یک, یکی, یکی از, یک نفر
It's a present for one of my children.
We think of you as one of the family.
4
B1
a person of the type mentioned
یکی, یک نفر, شخصی, یک آدم, یک شخص, یک تن, یک فرد, کسی, آدمی
10 o’clock is too late for the little ones.
He ached to be home with his loved ones.
She was never one to criticize.
5
B2
used to mean ‘people in general’ or ‘I’, when the speaker is referring to himself or herself
آدم, شخص
One should never criticize if one is not sure of one's facts.
One gets the impression that they disapprove.
6
a person whose behaviour is funny or surprising
فرد جالب, شخص مضحک, فرد بامزه, شخص عجیب
Oh, you are a one!
7
the joke
لطیفه, طنز, شوخی, مزاح
Have you heard the one about the Englishman, the Irishman and the Scotsman?