Noun
plus one (plural plus ones)
A friend or date whom one brings along to an event; a guest of a guest.
plus-one (plural plus-ones)
Alternative spelling of plus one
plus-one
In the arithmetic of love, one plus one equals everything, and two minus one equals nothing. Mignon McLaughlin
A miracle is when the whole is greater than the sum of its parts. A miracle is when one plus one equals a thousand. Frederick Buechner
One plus one does not equal two. Howard Bloom
My mathematics is simple: one plus one = one. Dejan Stojanovic
Okay, sense of humor: plus one. Being able to laugh at yourself: plus one. Being able to laugh at other people without being mean: plus one. Vanity: minus one. Katie Aselton
One plus one makes eleven. Kashmir Proverb