unbacked adjective. [ʌn'bakt] L16.
[from UN-¹ + BACK noun¹, verb: see -ED², -ED¹.]
Not backed; spec. (a) (of a horse) unmounted, unridden; not broken in; (b) not supported or endorsed; (c) (of a racehorse etc.) not betted on; (d) not provided with a back or backing.

■ unbackable adjective not able to be backed E20.

[TahlilGaran] English Dictionary ▲