Definitions
1.verb(obsolete outside Scotland) To separate, divide.
2.verb(obsolete outside Scotland) To split, part; to go away, depart.
3.verb(usually in the passive) To join, unite; to form links between (now especially of two places in different countries)."Coventry twinned with Dresden as an act of peace and reconciliation, both cities having been heavily bombed during the war."
4.verbTo be paired or suited.
5.verbTo give birth to twins.
6.verbTo be born at the same birth.
7.nounAction of the verb to twin
8.nounGiving birth to twins
9.nounThe pairing of similar objects (such as towns)
10.nounThe formation of twin crystals
11.nounThe conversion of a road into a dual carriageway
12.adjectiveBiparous