Longman Dictionary of Contemporary English homepage

Sense: 1-3
Date: 1800-1900
Language: Dutch
Origin: baas 'man in charge'
Sense: 4
Date: 1300-1400
Language: Old French
Origin: boce, from Vulgar Latin bottia

boss

1 noun
     
boss1 S2 W3 [countable]
1BEBO the person who employs you or who is in charge of you at work [↪ employer, manager, supervisor]:
I'll have to ask my boss for a day off.
Since I'm my own boss (=I work for myself, rather than for an employer), my hours are flexible.
2 informalBB someone with an important position in a company or other organization:
the new boss at Paramount Pictures
union bosses
3 the person who is the strongest in a relationship, who controls a situation etc:
When you first start training a dog, it's important to let him see that you're the boss.
You've got to show the kids who's boss.
4AVTB a round decoration on the surface of something, for example on the ceiling of an old building

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