adj(1)不平坦的，不整齐的，不规则的(not even;not formed in a regular way)[A(in)]：～surface/outline/coastline 不平坦的表面/不规则的轮廓/曲折的海岸线;an～group of buildings 杂乱的建筑物;straighten the child's～teeth 矫正小孩子不整齐的牙齿;These fields are～in shape. 这些田地的形状不规则。〖同〗uneven，rough;〖反〗 regular，even，smooth;

(2)间隔不均等的，不定期的(not happening at equally spaced points;not at regular intervals)[A(in)]：～appearances/intervals 不定期出现/间隔不等;an～pulse 不均匀的脉搏;be～in attending lessons/in one's attendance at lessons 不时缺课;The buses from here are～. 这里的汽车发车时间不定。〖反〗 regular;

(3)不合常规(习俗)的(not according to rules or custom)[通常作pred]：～conduct/practices/situations不合常规的行动/不合常规的做法/不正常的情况;These procedures are/His conduct is/Wearing shorts to the office is highly (extremely)～. 这些步骤(过程)/他的行为/穿短裤去办公室上班很不合常规。〖同〗 unusual，improper;〖反〗 regular，normal，usual，proper，common;

(4)不规则的(not having usual or regular forms)(gram)：～verbs 不规则动词;The plural of “woman” is～. “woman” 一词的复数是不规则的。〖反〗 regular;

(5)(军队)非正规的((of troops) not belonging to the regular army)：～troops 非正规军;

n非正规军的士兵(soldier not belonging to the regular army)[通常pl];

←′regular adj 规则的，常规的;

→ir͵regu′larity n不规则(的事)，不合常规(的事);ir′regularly adv 不规则地，非常规地