plural best friends
Definition of best friend
1 : a person's closest and dearest friend She's my best friend. We have been best friends since high school.
2 : a person's most desirable or valuable possession or resource Diamonds may be a girl's best friend, but gold is more affordable.— William Giese Lycra-cotton leggings and tunic tops are the pregnant woman's best friend, sartorially speaking.— Anne Reeks When cops bang on the door, the toilet is a drug dealer's best friend.— Frederick Kaufman — see also man's best friend
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