Liminal
Liminal is an English adjective meaning "on the threshold", from Latin līmen, plural limina.
Liminal or Liminality may refer to:

Anthropology and religion
Liminality, the quality of ambiguity or disorientation that occurs in the middle stage of a rite of passage
Liminal deity, a god or goddess in mythology who presides over thresholds, gates, or doorways
Liminal being, mythical being of ambiguous existence
Liminal state, English translation of bardo in Tibetan Buddhism

Arts and media
Liminal States, a 2012 novel by Zack Parsons
.hack//Liminality, an animated series related to the .hack video game series
Liminal, a student literary journal at University of Minnesota, United States
Liminal, a 2017 remix album by Sigur Rós
Liminal, a 2022 album by Petbrick
Liminal spaces, empty places that appear eerie

Psychology
Limen, a threshold of a physiological or psychological response
Liminal experiences, feelings of abandonment (existentialism) associated with death, illness, disaster, etc.

See also
Limen (disambiguation)
Limerence, a stage or state of mind in a relationship
Limina, a comune in the Messina, Sicily, Italy