What is the meaning of From?

(prep.) Out of the neighborhood of; lessening or losing proximity to; leaving behind; by reason of; out of; by aid of; -- used whenever departure, setting out, commencement of action, being, state, occurrence, etc. or procedure, emanation, absence, separation, etc., are to be expressed. It is construed with, and indicates, the point of space or time at which the action, state, etc., are regarded as setting out or beginning; also, less frequently, the source, the cause, the occasion, out of which anything proceeds; -- the aritithesis and correlative of to; as, it, is one hundred miles from Boston to Springfield; he took his sword from his side; light proceeds from the sun; separate the coarse wool from the fine; men have all sprung from Adam, and often go from good to bad, and from bad to worse; the merit of an action depends on the principle from which it proceeds; men judge of facts from personal knowledge or from testimony.
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APAWebster's. (2011). from. Retrieved August 20, 2018, from http://smartdefine.org/from/definitions/2010357
ChicagoWebster's. 2011. "from" http://smartdefine.org/from/definitions/2010357 (accessed August 20, 2018).
HarvardWebster's 2011, from, Smart Define, viewed 20 August, 2018, <http://smartdefine.org/from/definitions/2010357>.
MLAWebster's. "from" 27 May 2011. Web. 20 August 2018. <http://smartdefine.org/from/definitions/2010357>