|Origin:||parallelus, from Greek parallelos, from para 'beside' + allelon 'of one another'|
two lines, paths etc that are parallel to each other are the same distance apart along their whole length:
Lines AB and CD are parallel.
two parallel roads
She was travelling parallel to her previous route.
The railway is parallel with the canal.
Take the road running parallel to the main road just after the village.
similar and happening at the same time:
Social changes in Britain are matched by parallel trends in some other countries.