thesis /'Oizsis; 'Sisis/ n (pl theses /'Oi: si: z; 'Oisiz/) statement or theory (to be) put forward and supported by arguments, esp a lengthy written essay submitted (as part of the requirements) for a university degree.論題; 論文; (尤指)畢業(yè)論文; 學(xué)位論文。