a plus sign

Translations
знак плюс
The plus sign is used in addition.
Знак плюс используется в сложении.
Definitions
A plus sign is a symbol (+) used in mathematics to indicate addition or a positive value. It can also represent an increase or a positive relationship in various contexts.
Words
a

article or possessive pronoun
а
plus

adjective
плюс
sign

noun
знак