Liminality
The in-between condition during a rite of passage, when a person is neither what they were nor yet what they will be.
Also: liminal, betwixt and between, threshold state
From Latin limen, threshold. Arnold van Gennep named the middle phase of passage rites, and Victor Turner developed it in the 1960s to describe a time when ordinary rules are suspended and participants are stripped of rank, sometimes bound in a shared bond he called communitas. Initiates in seclusion, a bride on the eve of a wedding, a mourner before burial are common cases. Many magical beliefs concern thresholds in this sense: doorways, crossroads, dusk, dawn and the turn of the year are all believed to be times when ordinary protections thin. The idea is now used well beyond ritual, for migration, illness and other transitions.