Year  n. 1 time occupied by the earth in one revolution round the sun, approx. 3651/4 days. 2 = *calendar year. 3 period of twelve months, starting at any point (four years ago; tax year). 4 (in pl.) Age, time of life (young for his years). 5 (usu. In pl.) Colloq. Very long time. 6 group of students entering college etc. In the same academic year. [old english]