Cal. Civ. Code § 38-12-1301

As used in
this part 13, unless the context otherwise requires:

(1) 
"Accessory dwelling unit" has the meaning set forth in section
38-12-801 (7)(a).

(2) 
"Cause" means a circumstance described in section 38-12-1303 (2).

(3) 
"Dwelling unit" has the meaning set forth in section 38-12-502 (3).

(4) 
"Family member" has the meaning set forth in section 8-13.3-503 (11).

(5) 
"Landlord" means a landlord, as defined in section 38-12-502 (5);
except that "landlord" does not include the management or landlord of
a mobile home park, as defined in section 38-12-201.5 (3), unless:

(a) The
management or landlord of a mobile home park is renting both a mobile home
space, as defined in section 38-12-201.5 (6.5), and a mobile home, as defined
in section 38-12-201.5 (5), to a mobile home park resident, as defined in
section 38-12-201.5 (11); and

(b) The
mobile home park resident is not residing in the mobile home park under a
lease-to-own agreement.

(6) 
"No-fault eviction" means an action brought by a landlord pursuant to
article 40 of title 13 for the eviction of a tenant under conditions described
in section 38-12-1303 (3).

(7) 
"Primary residence" means the address that is listed on a tenant's or
landlord's Colorado driver's license, identification card, or voter
registration; used for purposes of a tenant's or landlord's payment of state or
federal taxes; or used for the purpose of public school registration at the
time that a valid no-fault eviction is exercised by a landlord pursuant to
section 38-12-1303 (3).

(8) 
"Proper service" means service that complies with section 13-40-108.

(9) 
"Rent" means any money or other consideration paid to a landlord for
the right to use, possess, and occupy a dwelling unit.

(10) 
"Rental agreement" has the meaning set forth in section 38-12-502
(7).

(11) 
"Residential premises" has the meaning set forth in section 38-12-502
(8).

(12) 
"Short-term rental property" means a residential premises that is
leased:

(a) For
less than thirty consecutive days in exchange for remuneration and for
temporary, recreational, business, or transient purposes; or

(b) 
Pursuant to a rental agreement or other occupancy agreement if the tenant of
the rental agreement or other occupancy agreement is renting the residential
premises for less than six months from a landlord to which the tenant sold the
residential premises.

(13) 
"Substantial repairs or renovations" means repairs or renovations
that:

(a) 
Cannot be reasonably accomplished in a safe or efficient manner with the tenant
in place;

(b) Are
not repairs or renovations that are necessary to remedy a breach of the
warranty of habitability described in section 38-12-503; and

(c) 
Require the tenant to vacate the residential premises for at least thirty days.

(14) 
"Tenant" has the meaning set forth in section 38-12-502 (9).
"Tenant" does not include a home owner, as defined in section
38-12-201.5 (2).

(15) 
"Written notice" means written notice to vacate that:

(a) 
Complies with section 13-40-106; and

(b) Is
provided to a tenant by a landlord or by a landlord's agent.