- consisting of or being two separate but similar or closely related things; forming a pair; double; paired
- being one of a pair of such things; being a counterpart
- being two offspring from the same pregnancy: twin girls
- being either one of two offspring from the same pregnancy: a twin sister
Origin of twinMiddle English from Old English twinn and Old Norse tvinnr, double, both from base of two
- either one of two offspring from the same pregnancy: twins are either identical (produced from the same ovum) or fraternal (produced from separate ova)
- either one of two persons or things very much alike in appearance, shape, structure, etc.
- a compound crystal of two crystals or parts having a common face but in reversed positions with respect to each other
- twin bed
intransitive verbtwinned, twin′ning
- to give birth to twins
- to be paired or coupled (with another)
- Archaic to be born at the same birth
- to give birth to as twins
- to be or provide a counterpart to
- to pair or couple
Gemini, the constellation and third sign of the zodiac
- One of two offspring born at the same birth.
- One of two identical or similar people, animals, or things; a counterpart.
- twins Mineralogy Two interwoven crystals that are mirror images of each other.
- A twin bed.
- Being two or one of two offspring born at the same birth: twin sisters.
- Being two or one of two identical or similar people, animals, or things: twin cities; a twin bed.
- Botany Of or relating to structures, such as flowers, that occur in pairs.
- Consisting of two identical or similar parts: a twin lamp fixture.
- Being of a size that will fit a twin bed: twin sheets.
verbtwinned, twin·ning, twins
- a. To give birth to twins.b. Archaic To be one of twin offspring.
- To be paired or coupled.
- To pair or couple.
- To provide a match or counterpart to.
Origin of twinMiddle English from Old English twinn twofold ; see dwo- in Indo-European roots.
- (baseball) A player that plays for the Minnesota Twins.