Capable of being divided or disjoined. The two parts of the machine are separable for easy maintenance.
Able to be distinguished or treated as distinct. The issues in the case are separable and should be addressed individually.
Allowing its particle, prefix, or other element to be placed apart from the verb root (linguistics). In German, "aufstehen" is a separable verb because the particle "auf" can move away from the stem.
Containing a countable dense subset (topology). The space of continuous real-valued functions on [0,1] with the uniform norm is separable.