principal

1. Primary; most important; first level in importance.

   Smith is the principal architect of this design.

   The principal cause of the failure was poor planning.

   hauptsächlich, Haupt-, wesentlich

   гла́вныйglávnyj, основно́йosnovnój

   головни́йholovnýj, основни́йosnovnýj

   most important element

2. Chosen or assumed among a branch of possible values of a multi-valued function so that the function is single-valued.

   Two is the principal square root of 4. Both −2 and +2 are square roots of 4.

3. (Latinism, obsolete)Of or relating to a prince; princely.

1. The principal came in after the teacher.

   Директор зайшов після вчителя. — ascolto

   ruДиректор вошёл вслед за учителем. — averoes

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2. The principal wants to talk to you.

   Директор хоче з тобою поговорити. — deniko

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3. Tom is the principal of a high school.

   Том — директор школи. — deniko

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4. I met the principal himself.

   Я зустрівся із самим директором школи. — ChickenKiev

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5. I bet he is our principal.

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regular