You can use in one to indicate that something is a single unit, but is made up of several differentparts or has several different functions.
...a love story and an adventure all in one.
This cream moisturises and repairs in one.
See full dictionary entry for one
in one in British English
or all in one
combined; united
See full dictionary entry for one
Examples of 'in one' in a sentence
in one
Plans for a bar in one of the new venues have provoked warnings from alcohol awareness groups.
Times, Sunday Times (2016)
You will realise how much sugar is in one single mouthful and not want much more.
The Sun (2017)
You can be really upset and dwell on something or you can put all the good memories in one song.
The Sun (2017)
They are bound for tropical climes, with something magical in one of their packing cases.
Times, Sunday Times (2016)
By visiting three very different ties in one afternoon, we might come closer to answering that.
Times, Sunday Times (2017)
I could be feeling something in one month or three months down the road.
The Sun (2016)
Yet bundling together different allegations in one case is fraught with danger.
Times, Sunday Times (2014)
We are talking about a lot of people involved in one story.
Times, Sunday Times (2010)
This situation has changed in one respect at least.
Aganbegyan, Abel Inside Perestroika: The Future of the Soviet Economy (1990)
You tell him things in one ear and they go out the other one.
The Sun (2015)
Then exhale the stress in one single breath.
The Sun (2012)
Then something odd happened in one of his fly bottles.
Wills, Christopher The Runaway Brain: the Evolution of Human Uniqueness (1993)
Where do you build new homes in one of the most beautiful cities in the world?
Times, Sunday Times (2006)
Soon that nagging pain in one toe becomes blood poisoning.
Christianity Today (2000)
We recently had four offers for different properties in one weekend.
Times, Sunday Times (2013)
But in one respect the story was one of continuity.
Times, Sunday Times (2015)
Two things cannot be in one place.
Frances Hodgson Burnett The Secret Garden (1911)
Here is the full range of emotional reactions on a single night in one family.
The Times Literary Supplement (2014)
But in one room something is odd.
Times, Sunday Times (2012)
We stayed in one in the new wing.
The Sun (2012)
Nowadays the very concept of personal ethics has become problematic in one domain after another.
Times, Sunday Times (2010)
Some chose to have up to five different piercings in one go.
Times, Sunday Times (2015)
The kind of love that is in one sense the most moving and the most memorable is that which is unrequited.
Claudia Hammond EMOTIONAL ROLLERCOASTER: A Journey Through the Science of Feelings (2005)
She warns about the hot studio lights, which once melted cream in one of her towers.
The Sun (2014)
A family visits a cemetery in one story.
The Times Literary Supplement (2010)
His 24 goals that season included four in one match and a rare chipped goal from close to the corner flag.
John Foot Calcio: A History of Italian Football (2006)
The most common scam is carousel fraud, which occurs when goods manufactured in one country are sold to business clients in another.
Times, Sunday Times (2006)
All related terms of 'in one'
all-in-one
denoting a single object or system that consists of or functions as several different items
hole in one
a shot from the tee that finishes in the hole
in one piece
If someone or something is still in one piece after a dangerous journey or experience , they are safe and not damaged or hurt .
in one's DNA
existing as a fundamental and inseparable part of one’s character
a hole in one
If you get a hole in one in golf , you get the golf ball into the hole with a single stroke .
get it in one
to make a correct first guess
have it in one
to have the ability (to do something)
in one's blood
If a quality or talent is in your blood , it is part of your nature , and other members of your family have it too.
in one's book
in one's opinion
in one's court
in one's side of the court , as a ball in a tennis game
in one's cups
drunk
in one's element
If you say that someone is in their element , you mean that they are in a situation they enjoy .
in one's face
directly opposite or against one
in one's favor
to one's credit or advantage
in one's glory
at one's best , happiest , etc.
in one's heart
secretly; fundamentally
in one's pocket
under one's control
in one's power
able or allowed (to)
in one's tracks
on the very spot where one is standing (esp in the phrase stop in one's tracks )
one in a million
very special
be in one's cups
If someone is in their cups , they are drunk .
dip one's toe in
to begin doing or try something new or unfamiliar
get one's eye in
to become accustomed to the conditions, light, etc, with a consequent improvement in one's performance
in one fell swoop at one fell swoop
If something is done in one fell swoop or at one fell swoop , it is done on a single occasion or by a single action .
put one's oar in
to interfere or interrupt
cash in one's chips
to turn in one's chips for their equivalent in money
cry in one's beer
to lament or complain in a maudlin manner
dig in one's heels
to refuse to give up or modify one's opinion , policy, attitude , etc., esp. when faced with opposition
dig one's heels in
to refuse stubbornly to move or be persuaded
draw in one's horns
to suppress or control one's feelings, esp of anger , enthusiasm , or passion
feel in one's bones
to have an intuition of
flea in one's ear
a sharp rebuke
get in one's hair
to annoy one
in one's own right
If someone is a successful or respected person in their own right , they are successful or respected because of their own efforts and talents rather than those of the people they are closely connected with.
in one's own time
outside paid working hours
in one's own words
If you say something in your own words , you express it in your own way , without copying or repeating someone else's description .
in one's right mind
sane
in one's shirtsleeves
not wearing a jacket
keep one's hand in
to continue or practise
lie in one's throat
to tell a foul or outrageous lie
pull in one's horns
to hold oneself back; restrain one's impulses or efforts
put one in mind of
to remind (one) of
stick in one's craw
to be difficult , or against one's conscience , for one to accept, utter , or believe
stick one's bib in
to interfere
throw in one's hand
(in cards) to concede defeat by putting one's cards down
throw one's hand in
→ throw in (sense 3 )
a beam in one's eye
a fault or grave error greater in oneself than in another person
a flea in one's ear
a sharp rebuke
beam in one's own eye
a major moral flaw in oneself which one ignores while criticizing minor faults in others
be set in one's ways
If you say that someone is set in their ways , you are being critical of the fact that they have fixed habits and ideas which they will not easily change, even though they may be old-fashioned .