freestanding

adj

1. (not-comparable)Standing or set apart.

   “Near-synonyms: isolated, insulated, detached, individuated, separated”

   “The Leaning Tower of Pisa is a freestanding bell tower.”

2. (not-comparable)Not attached to anything.
3. (not-comparable)Not supported by or on anything.
4. (not-comparable)Of a computer program: that runs directly on a computer's hardware, without being managed by an operating system.

   “Freestanding C programs do not need to have a main function.”