There are 2 definitions of is in English:

is

Line breaks: is
third person singular present of be.

More definitions of is

Definition of is in:

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Word of the day grammarian
Pronunciation: grəˈmɛːrɪən
noun
a person who studies and writes about grammar

There are 2 definitions of is in English:

IS

Line breaks: IS

abbreviation

Iceland (international vehicle registration).

Origin

from Icelandic Ísland.