I found a more in-depth definition of provisional housing from the Canadian Observatory on Homelessness (via Homeless Hub):
INTERIM HOUSING FOR PEOPLE WHO ARE HOMELESS
Interim housing is a systems-supported form of housing that is meant to bridge the gap between unsheltered homelessness
or emergency accommodation and permanent housing. In some cases referred to as ‘transitional housing’, this form
of accommodation typically provides services beyond basic needs, offers residents more privacy, and places greater
emphasis on participation and social engagement. Interim housing targets those who would benefit from structure,
support and skill-building prior to moving to long term housing stability, with the ultimate goal of preventing a return to
homelessness. In the case of second-stage housing for those impacted by family violence, the key characteristics of this
housing are the safety and security it provides, trauma recovery supports, along with the ultimate goal of preventing revictimization.
Interim housing has time limitations on residency, but generally allows for a longer stay (in some cases up
to three years) compared to emergency shelters.
3.2 PEOPLE LIVING TEMPORARILY WITH OTHERS, BUT WITHOUT GUARANTEE OF CONTINUED RESIDENCY OR
IMMEDIATE PROSPECTS FOR ACCESSING PERMANENT HOUSING
Often referred to as ‘couch surfers’ or the ‘hidden homeless’, this describes people who stay with friends, family, or even
strangers. They are typically not paying rent, their duration of stay is unsustainable in the long term, and they do not have the
means to secure their own permanent housing in the future. They differ from those who are staying with friends or family out of
choice in anticipation of prearranged accommodation, whether in their current hometown or an altogether new community.
This living situation is understood by both parties to be temporary, and the assumption is that it will not become permanent.
3.3 PEOPLE ACCESSING SHORT TERM, TEMPORARY RENTAL ACCOMMODATIONS WITHOUT SECURITY OF TENURE
In some cases people who are homeless make temporary rental arrangements, such as staying in motels, hostels, rooming
houses, etc. Although occupants pay rent, the accommodation does not offer the possibility of permanency. People living
in these situations are often considered to be part of the ‘hidden homeless’ population.
3.4 PEOPLE IN INSTITUTIONAL CARE WHO LACK PERMANENT HOUSING ARRANGEMENTS
Individuals are considered to be provisionally accommodated and ‘at risk’ of homelessness if there are no arrangements in
place to ensure they move into safe, permanent housing upon release from institutional care. This includes individuals who:
a) were homeless prior to admittance (where their stay may be short-term or long-term) and who have no
plan for permanent accommodation after release; or
b) had housing prior to admittance, but lost their housing while in institutional care; or
c) had housing prior to admittance, but cannot go back due to changes in their needs.
In either case, without adequate discharge planning and support, which includes arrangements for safe and reliable
housing (and necessary aftercare or community-based services), there is a likelihood that these individuals may transition
into homelessness following their release. Institutional care includes:
• Penal institutions
• Medical/mental health institutions
• Residential treatment programs or withdrawal management centers
• Children’s institutions/group homes
3.5 ACCOMMODATION/RECEPTION CENTERS FOR RECENTLY ARRIVED IMMIGRANTS AND REFUGEES
Prior to securing their own housing, recently arrived immigrants and refugees may be temporarily housed while receiving
settlement support and orientation to life in Canada. They are considered to be homeless if they have no means or
prospects of securing permanent housing.