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per‧son‧al S1 W1

1 [only before noun] belonging or relating to one particular person, rather than to other people or to people in general COLLOCATIONS 
somebody's (own) personal view/opinion personal taste/preference personal possessions/property/belongings personal effects (=small possessions, clothing, documents etc) (know something from) personal experience personal qualities take a personal interest (in something) for personal use on a personal level (=used for giving your own opinion, rather than that of an organization etc you represent) personal trainer/bodyguard/assistant (=someone who works for you and only you)
She took full personal responsibility for all the arrangements.

somebody's (own) personal view/opinion personal taste/preference personal possessions/property/belongings personal effects (=small possessions, clothing, documents etc) (know something from) personal experience personal qualities take a personal interest (in something) for personal use on a personal level (=used for giving your own opinion, rather than that of an organization etc you represent) personal trainer/bodyguard/assistant (=someone who works for you and only you)
She took full personal responsibility for all the arrangements.2 relating to the private areas of your life :
The envelope was marked 'Personal and Confidential'.
We're not allowed to make personal phone calls at work.
The envelope was marked 'Personal and Confidential'.
We're not allowed to make personal phone calls at work.3 involving rude or upsetting criticism of someone :
It's unprofessional to make such personal remarks.
a bitter personal attack on the president
It's unprofessional to make such personal remarks.
a bitter personal attack on the president (it's) nothing personal (=used to tell someone that you are not criticizing them)
It's nothing personal, I just have to go home now.
It's nothing personal, I just have to go home now.4 if you give something your personal care or attention, you deal with it yourself instead of asking someone else to do it :
Small companies can devote more personal attention to each project.
As you get promoted in a firm you lose that personal contact (=meeting and dealing with people yourself).
Small companies can devote more personal attention to each project.
As you get promoted in a firm you lose that personal contact (=meeting and dealing with people yourself).6 [only before noun] relating to your body or the way you look :
7 something you do to make something special, or that makes someone feel special :
It's those extra personal touches that make our service better.
personal touch
It's those extra personal touches that make our service better.8 the fastest time, most points etc that a sportsman or sportswoman has ever achieved :
I ran 20.51 seconds for a personal best.
personal best
I ran 20.51 seconds for a personal best.