1. sister - Noun
2. sister - Verb
A female who has the same parents with another person, or who has one of them only. In the latter case, she is more definitely called a half sister. The correlative of brother.
A woman who is closely allied to, or assocciated with, another person, as in the sdame faith, society, order, or community.
One of the same kind, or of the same condition; -- generally used adjectively; as, sister fruits.
To be sister to; to resemble closely.
Source: Webster's dictionaryBrevity is the sister of talent. Anton Chekhov
To steal from a brother or sister is evil. To not steal from the institutions that are the pillars of the Pig Empire is equally immoral. Abbie Hoffman
Sister is probably the most competitive relationship within the family, but once the sisters are grown, it becomes the strongest relationship. Margaret Mead
If you do not travel, you will marry your own sister. Mozambican Proverb
Beauty is the sister of idleness and the mother of luxury. Russian Proverb
The little hemlock is sister to the great hemlock. Manx Proverb