Lines that run alongside each other at equal distances without ever meeting. Can also refer to similarities or comparisons between different things or situations.
From Greek 'parallelos' meaning 'beside one another' (para 'beside' + allelos 'one another'). Entered English via Latin 'parallelus' in the 16th century, initially as a geometric term before expanding to metaphorical uses.
The geometric precision of 'parallel' has made it a powerful metaphor in literature and philosophy - we speak of parallel lives, parallel universes, and drawing parallels between events. This mathematical concept has become essential for expressing how separate things can maintain constant relationships across space or time.
Complete word intelligence in one call. Free tier — 50 lookups/day.