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[ noncount ] the facts or events that are connected with a situation

I need to get some background information .

back • log / 'breklog ; 'breklag / noun [count]

work, etc. that has not yet been done and needs to be done I have a huge backlog of e-mails to answer.

back • pack1 / 'brekprek / noun

[count]

a large bag that you carry on your back when you are traveling

—Look at the picture at bag .

back • pack 2 / ' brekprek / verb ( back.packs,back.pack. ing ,back packed )

to go walking or traveling with your clothes, etc. in a backpack

► back • pack • ing / ' brekprekig / noun

[noncount]

We went backpacking around Europe last summer.

back • side / ' breksaid / noun [ count ] ( informal )

the part of your body that you sit on

back • stage / |brek ' steid₃ / adverb

in the part of a theater where the performers get dressed, wait, etc.

We got to go backstage and meet the band after the concert.

back • stroke / ' brekstrouk / [noncount]

( sports ) a way of swimming on your back

back • up / ' brekAp / noun

[ noncount ] extra help or support that you can get if

necessary

The police had backup from the army.

[ count ] ( computers ) a copy of information that you have put in your computer and which you do not want to lose

Always make a backup of your computer files.

back .ward iO / brekwsrd / ( also back . wards / ' brekwsrdz / ) adverb

toward a place or a position that is behind Could everyone take a step backward?

—ANTONYM forward

with the back or the end first

If you say the alphabet backward, you start with "Z." backward and forward

first in one direction and then in the other, many times The dog ran backward and forward, fetching sticks.

back • ward2 / ' brekwsrd / adjective

in the direction behind you a backward step

slow to learn or change

Our teaching methods are backward compared to some countries.

back • yard / |brek'yard / noun

[count]

the area behind and around a house

Everyone was in our backyard, sitting or lying on the grass.

ba • con / beiksn / noun

[noncount]

long thin pieces of meat from a pig We had bacon and eggs for breakfast.

bac • te • ri • a / brek ' tiris / noun [ plural ]

( biology ) very small things that live in air, water, earth, plants, and animals. Some bacteria can make us sick.

bad © / bred / adjective ( wors< , vorst )

not good or nice

The weather was very bad.

He had some bad news — his uncle died.

a bad smell

serious

She had a bad accident.

not done or made well bad driving

not able to work or do something well My eyesight is bad.

Do you think he's a bad teacher?

too old to eat; not fresh bad eggs

not good; morally wrong

In cowboy movies, the bad guys always wear black hats. Word building

If something is very bad, you can say awful , dreadful , or terrible : I've had a terrible day.

Something that is not nice or someone who is unkind is horrible : He's always saying horrible things to me. bad at something

If you are bad at something , you cannot do it well I'm very bad at sports. bad for you

If something is bad for you , it can make you sick Smoking is bad for you. go bad

to become too old to eat This fish has gone bad. not bad ( informal ) pretty good

"What was the movie like?" "Not bad." too bad ( informal )

words that you use when you are sorry or feel bad about something

It's too bad he lost his job.

badge / bred₃ / noun

[count]

a small piece of metal, cloth, or plastic with a design or words on it that you wear on your clothes a police officer's badge

badg • er / ' bred₃sr / noun

[ count ]