Timeless means the years do not touch it. A plain black dress, a stone bridge, a song your grandmother and your daughter both like.
You meet it most around design, style and art: a timeless classic, a timeless piece of furniture, timeless beauty. It also describes a place where time seems to have stopped — a timeless afternoon in a village where nothing happens and nobody minds. Here is the trap: timeless does not mean 'without time' or 'taking no time at all'. Something quick is not timeless; something that never dates is. The noun is timelessness, and the useful opposite is dated — last year's haircut is dated, a well-cut white shirt is timeless.
1adjectivetimelessNot changed or spoiled by the passing of years.
“The village had a timeless quiet about it.”
synonyms: ageless, enduring
2adjectivestyleNever going out of fashion.
“A navy coat with a good cut is timeless.”
synonyms: classic
Too few real examples of this word to estimate which sense is commonest.
Middle English
tyme
English
time
English, today
timeless
From time + -less. time comes from Middle English tyme. From Middle English tyme, time, from Old English tīma (“time, period, space of time, season, lifetime, fixed time, favorable time, opportunity”), from Proto-West Germanic tīmō, from Proto-Germanic tīmô (“time”), from Proto-Indo-European deh₂imō, from Proto-Indo-European deh₂y- (“to divide”). Related to tide. Not related to Latin tempus. 2
Etymology from Wiktionary, CC BY-SA