十五 shíwǔ fifteen Origin Definitions Defs Strokes Stroke Words Sentences Sents shíwǔ fifteen 十 shí numeral ten the number ten; 10五 wǔ numeral five the number five; 5shíwǔ Tenth Five-Year Plan 十 shí numeral abbreviation of 第十 dìshí tenth the tenth五 wǔ noun abbreviation of 五年计划 五年計劃 wǔniánjìhuà five-year plan A centralized economic development plan covering a period of five years.