I. by 1 S1 W1 /baɪ/ BrE AmE preposition
[ Language: Old English ; Origin: be , bi ]
1 . WHO/WHAT DOES SOMETHING used especially with a ↑ passive verb to say who or what does something or makes something happen:
I was attacked by a dog.
a church designed by the famous architect, Sir Christopher Wren
We are all alarmed by the rise in violent crime.
interference by the state in the affairs of the Church
his appointment by the BBC as a producer
2 . MEANS/METHOD used to say what means or method someone uses to do something:
You can reserve the tickets by phone.
Send it by airmail.
Some customers prefer to pay by cheque.
by car/train/bus/taxi etc
They travelled to Chicago by train.
by air/sea/land/road/rail etc
All supplies are transported by air.
by doing something
She earns her living by selling insurance.
He was taken from his home by force.
3 . ROAD/DOOR used to say which road, entrance, door etc someone uses to get to a place:
They came in by the back door.
It’s quicker to go by the country route.
4 . TAKING HOLD used to say which part of an object or of a person’s body someone takes hold of:
He took Elaine by the arm and led her across the road.
She grabbed the hammer by the handle.
5 . WRITER/COMPOSER ETC used to give the name of someone who wrote a book, produced a film, wrote a piece of music etc:
the ‘New World Symphony’ by Dvorak
a short story by Charles Dickens
Who’s it by?
6 . BESIDE beside or near something:
She stood by the window.
Jane went and sat by Patrick.
7 . PAST past someone or something without stopping:
He walked right by me without even saying hello.
I pass by the farm every day on my way to work.
8 . BEFORE before or not later than a particular time:
The documents need to be ready by next Friday.
I reckon the film should be over by 9.30.
By the end of the day we had sold over 2,000 tickets.
By the time we got home we were tired and hungry.
9 . ACCORDING TO according to a particular rule, method, or way of doing things:
You’ve got to play by the rules.
Profits were £6 million, but by our standards this is low.
10 . CHANGE/DIFFERENCE used to say how great a change or difference is:
The price of oil fell by a further $2 a barrel.
I was overcharged by £3.
Godard’s first film was better by far (=by a large amount or degree) .
11 . MEASUREMENTS used to give the measurements of a room, container etc:
a room 15 metres by 23 metres
12 . QUANTITY used to show what unit of measurement or quantity is involved in selling, paying for, producing etc something:
Eggs are sold by the dozen.
We’re paid by the hour.
She wanted to tear his hair out by the handful.
13 . GRADUAL CHANGE used to say that something happens gradually:
Day by day, he grew weaker.
Little by little, I was beginning to discover the truth about Garfield.
One by one, the men stepped forward.
14 . QUICK CHANGE used to say that something or someone is quickly becoming worse, better etc:
The financial crisis was growing more serious by the hour.
15 . LIGHT used to say that something happens in a particular kind of light:
We walked through the palace gardens by moonlight.
16 . by day/night during the day or the night:
a tour of Paris by night
17 . JOB/NATURE ETC used when you are giving information about someone’s character, job, origin etc:
George I and George II were Germans by birth.
Cautious by nature, Simpkin was reluctant to interfere.
Robert Key was a teacher by profession.
18 . VISITING in order to visit a person or place for a short time:
On the way, I stopped by the post office.
19 . (all) by yourself
a) completely alone:
Dave spent Christmas all by himself.
b) without help from anyone:
You can’t move the furniture all by yourself.
20 . MULTIPLYING/DIVIDING used between two numbers when talking about multiplying or dividing:
What’s 48 divided by 4?
21 . EMPHASIS used when expressing strong feelings or making serious promises:
By God, I’ll kill that boy when I see him!
22 . FATHER if a woman has children by a particular man, that man is the children’s father:
She’s got two children by her previous husband.
23 . by the by spoken used when mentioning something that may be interesting but is not particularly important:
By the by, Ian said he might call round tonight.
⇨ by the way at ↑ way
• • •
By is used, especially after passive verbs, to say who or what does something:
The article was written by a university professor.
She was hit by a truck.
With is used after verbs that describe a state rather than an action:
The books were covered with dust (NOT by dust).
Her house is always filled with music.
By is used to say what means or method someone uses to do something:
He replied by email.
With is used to say what tool is used to do something:
Clean the surface thoroughly with a wire brush (NOT by a wire brush).
II. by 2 S1 W1 BrE AmE adverb
1 . past someone or something:
As I was standing on the platform, the Liverpool train went whizzing by.
James walked by without even looking in my direction.
2 . used to say that time passes:
As the summer days slipped by, it was easy to forget about the war.
Ten years had gone by since I had last seen Marilyn.
3 . beside or near someone or something:
A crowd of people were standing by, waiting for an announcement.
4 . in order to visit a person or place for a short time:
Why don’t you stop by for a drink after work?
5 . by and large used when making a general statement:
By and large, the new arrangements have worked well.
6 . by and by old use soon:
She will be better by and by.