You probably mean contiguous. =)
It means very close (in time or space).
Sharing an edge or boundary; touching.
Neighboring; adjacent.
touching along the side or boundary; in contact
preceding or following in time
(from Latin contiguus, from contingere to touch)
Washington
Contiguous (note spelling) means touching.
I think there are two possibilities 1. A gene is the contiguious series of codons ,nothing but series of triplet codons. So as we know that an aminoacid coded by more than one codon(except Methionine and tryptophan) atleast two codon codes for each amino acids. So a trait that is in the sense of a polypeptide which made by joinig by series of aminoacids which may be coded by different codons. 2. Due to trans splicing as here two different genes are involved in synthesis of a single polypetide.