adj(1)不在(缺席)的(not present)[A(from)]：Only one pupil is～today.今天只有一个学生缺勤。She has already been～an hour.她已经有一个小时不在了。be～from school/work/a lecture/a meeting with a cold 因感冒未上学/未上班/缺课/未出席会议;Let's drink a toast to～friends.让我们为没来的朋友们干一杯! hurry back to find sb still～匆忙赶回来发现某人还不在;〖反〗present;

(2)缺乏(不存在)的(not existing; lacking or missing)[A(from)]：Love was totally～from his childhood.他从小就根本没有得到过爱。Snow is～in some countries. 一些国家不下雪。The male bird has red on its head but in the female this is～.雄鸟头顶是红的，雌鸟则不是。Scales are～in eels.鳝鱼没有鳞。

(3)心不在焉的，茫然的(showing that one is not paying attention to what is happening around one; inattentive)：have rather an～expression on one's face/look in one's eyes 脸上有一种很心不在焉的表情/眼中有一种很心不在焉的神色;an～air 心不在焉的神态;give sb an～look心不在焉地看一下某人;an～stare 茫然的目光;look at sb in an～way 茫然地看着某人;〖同〗inattentive;〖反〗attentive，thoughtful;

→′absently adv 心不在焉地;͵absent-′minded adj 心不在焉的;͵absent-′mindedly adv 心不在焉地;′absence n;

vt 缺席，不到(在)(stay away from)[T+n，T+n(oneself)+prep(from)](fml)：～oneself from work/a meeting 没有上班/出席会议;Several students～ed themselves from the lecture.好几个学生没来上课。〖反〗attend;

→͵absen′tee n 缺席者;͵absen′teeism n 经常随意缺席;

【说明】absent oneself from 指故意的行为;be absent from 则无“故意”的含义，仅指“未出席，不在场”的状况。