n. The quality or state of being self-sufficient. [ 1913 Webster ]

a. 1. Sufficient for one's self without external aid or cooperation. [ 1913 Webster ]

Neglect of friends can never be proved rational till we prove the person using it omnipotent and self-sufficient, and such as can never need any mortal assistance. South. [ 1913 Webster ]

2. Having an overweening confidence in one's own abilities or worth; hence, haughty; overbearing. “A rash and self-sufficient manner.” I. Watts. [ 1913 Webster ]

a. Sufficing for one's self or for itself, without needing external aid; self-sufficient. -- Self`-suf*fi"cing*ness, n. J. C. Shairp. [1913 Webster]