What does "practicable" mean?

Practicable: Capable of being used; passable; as, a practicable weapon; a practicable road. Practicable breach (Mil.), a breach which admits of approach and entrance by an assailing party. -- Practicable, Possible. A thing may be possible, i. e., not forbidden by any law of nature, and yet may not now be practicable for want of the means requisite to its performance. -- Prac"ti*ca*ble*ness, n. -- Prac"ti*ca*bly, adv.