αρχηγός in English:

We elected him our leader.

The guild leader relegated Vince to a lesser officer because he was abusing his power.

Al-Qaeda leader Osama Bin Laden has been killed by US forces in Pakistan.

Even people who don't believe in the Catholic church venerate the Pope as a symbolic leader.

Prospects for repair? "Prof. Shubaishen, the leader of the system development team, is presently unwell so we think it will take a while longer ..."

Mr Tom Jones has agreed to serve as the project leader for this new work item.

When challenged to pronounce "shibboleth", Christopher Columbus did it in such a perfect way, that he was instantly recognized as the new leader of the natives' army.

They also teach that, for great sins, they cannot receive forgiveness unless they confess to their leader.

Squad Leader Justin, a blip's appeared on the hyperspace radar!

World leaders met this week to discuss global warming.

In dog ethology the leader is called 'alpha'; after that it continues with 'beta' and 'gamma'.

Today is November 10, we are commemorating the great leader Atatürk.

Out of a sense of justice, I said to the leader of the biker gang: "What you are doing is a crime! Be ashamed of yourselves!".

chief executive (officer)

The fact that educated Americans in general no longer share understandable background knowledge is a chief cause of their inability to communicate effectively.

In 776 B.C., the first Olympic Games were held at the foot of Mount Olympus to honor the Greeks' chief god, Zeus.

I had many reasons, love being chief among them.

The chief engineer did research hand in hand with his assistant.

As the date didn't work for the section chief, it was necessary to completely reorganize the drinking party.

We'll have to organize the drinking party all over again as the section chief can't make it now.

To my chief strategist, David Axelrod, who's been a partner with me every step of the way. To the best campaign team ever assembled in the history of politics! You made this happen, and I am forever grateful for what you've sacrificed to get it done.

A new chief of the security forces has just been appointed

O.K. chief. It's gonna cost you two century notes.

'major', 'key' or 'important' can be a synonym of te world 'chief'

Ireland’s chief cities are Dublin, Cork, Galway, Limerick and Waterford.

The chief clerk is not a hardworking man, but gets ahead rapidly because he knows how to curry favor with his superiors.