/wɪˈðɪn ||; wɪðˈɪn/prep adv1 in a period not longer than a particular length of time 在某段时间内: I'll be back within an hour. 我一小时内回来。She got married, found a job and moved house, all within a week. 她结了婚，找到了工作，搬了家，这一切都发生在一个星期内。
2 within sth (of sth) not further than a particular distance from sth 在某距离内: The house is within a kilometre of the station. 房子离车站不到一公里的地方。
3 not outside the limits of sb/sth 在某范围内: Each department must keep within its budget. 每个部门的开支都必须维持在预算以内。
4 (formal 正式) inside sb/sth 在…内: The anger was still there deep within him. 他内心深处仍然很生气。