先进先出 xiānjìnxiānchū first in, first out Origin Definitions Defs Strokes Stroke Words Sentences Sents 先 xiān adverb first earlier in time or sequence; beforehand; in advance进 進 jìn verb to enter To go or come into; to move from the outside to the inside.先 xiān adverb first earlier in time or sequence; beforehand; in advance出 chū verb to go out to go or come out; to exit (from inside to outside)