Asymptoting

[Dorothey Allen]

In mathematics, an [asymptote] is a line that continually approaches a given curve but does not [meet it] at any [finite] distance. In other words, though it curves towards zero, it approaches it [indefinitely] and never actually reaches it.

Asymptoting describes the phenomenon in which despite the regular passage of time, your relative perception of time appears to slow as you get closer to an event, date, time, etc. Because the line never reaches zero, but travels towards it for infinity, you too feel as if you will infinitely travel towards something that you will never reach. Much like the phenomenon of running towards a door in a dream, but never quite reaching it even though you are covering ground.