(1) 确定(切)的，界限清楚的(having very clear， fixed limits)：a～area 一个确定的地区;set～standards for sb 给某人定下明确的标准;Solids have～volume and shape. 固体有一定的体积和形状。〖反〗indefinite;

(2) 明确的，清楚的(clear; without any uncertainty or unclearness)：demand/want/give a～answer要求/希望得到/给出明确的答案;make a～promise/yes-or-no answer/decision作出明确的保证/或是或非的答复/决定;have a～idea/view/reason/opinion/plan 有明确的想法/观点/理由/意见/计划;That's～then， we'll meet at ten. 那么就这样决定了，我们10点见面。〖反〗indefinite;

(3) 肯定的，无疑的(unquestionable; not doubtful)：The book(thing) will be a～success/failure. 那本书(那件事)肯定会成功/失败。a～result 肯定结果;There was no～evidence. 没有肯定的证据。〖反〗indefinite;

(4) 准确的(clearly defined or determined;precise;exact)：a～quantity/time 准确的量/时间;～directions 准确的方向;〖同〗precise， exact， fixed; 〖反〗indefinite， inexact;

(5) 坚定的，果断的(having or showing firmness of opinion and willingness to act quickly)：～people/behaviour 坚定的人们/果断的行为;

(6) 确信的，有把握的(sure; certain; known positively) [A(about)， A+that] [作pred]：be (seem)～about the message/having seen sb/what had happened 是(看来)确信那消息/见过某人/已经发生的事情;Is he～about leaving his job? I can't decide. 他肯定会离职吗? 我拿不准。It's now～that the plane crashed/he'll take the job. 毫无疑问那架飞机坠毁了/他会接受那件活计的。It's not～that he'll go. 他不一定会去。Is it～that he is not coming? 他肯定不来了吗?〖同〗sure， certain， positive;〖反〗indefinite， unsure， uncertain;

→′definitely adv. 明确地，清楚地;肯定(无疑)地;当然;in′definite adj 不清楚的，不确定的;无确定期限的;in′definitely adv 无确定期限地