1.cross用作名词时的意思是“十字形”,转化为动词后可表示“画十字,划叉删去”,还可表示“交叉”“横穿,跨越”。引申可表示“反对,阻挠”。
2.cross既可用作不及物动词,也可用作及物动词。用作及物动词时,接名词或代词作宾语。cross与oneself连用常指某些基督徒“用手在胸前画十字”。

cross off¹(v.+adv.)
划掉 remove (sth) by drawing a line through it
▲cross sth ⇔ off
The teacher crossed off his name from the list.老师从名单上划掉他的名字。

cross off²(v.+prep.)
从…中划掉 remove (sth) from sth by drawing a line through it
▲cross sth off sth
I'll cross your name off the list.我将把你的名字从名单上划掉。

cross out(v.+adv.)
勾掉,划掉 draw a line through (writing) to remove it
▲cross sth ⇔ out
Cross out the last four names, they're not members any more.划掉最后四个名字,他们不再是这里的成员了。
Why did you cross out the last line of your letter?你怎么把信中的最后一行划掉了?
Cross out the numbers when you hear them.划去你听到的那些数字。

cross over(v.+adv.)
1.横〔越〕过(河等); 穿过(道路、屋子等) move across a river, road, room, etc.
▲cross over
Cross over at the traffic lights, where the road is safe.在交通指挥灯那儿过马路,那儿安全。
▲cross over to sth
He crossed over to the window to see if it was still misty.他走到窗户那儿,看看是不是还有雾霭。
If we had a boat we could cross over to the island.如果有条船的话,我们就可以越过大海到那个岛上去。
2.〈主英〉改变立场 change one's loyalty, especially political
▲cross over
They crossed over and joined the Opposition.他们改变立场加入了反对党。
▲cross over to sb
The Minister has threatened to cross over to the other side if the government refuses to accept his decision.那位部长威胁说,如果政府拒绝他的决定,他就要改而加入反对派。

cross with(v.+prep.)
1.与…一起横〔越〕过(马路等) move across (usually a road) with (sb/sth)
▲cross with sth
Cross with care at the traffic lights.横穿马路时要留心看交通指挥灯。
▲cross sth with sb
The children must cross the road only with a teacher or parent.孩子们必须和老师或父〔母〕亲一起过马路。
2.使…与…杂交 unite (an animal or plant) with (a different kind of animal or plant) to produce a mixed kind ofnew young or new plant
▲cross sb/sth with sb/sth
Is it possible to cross a tiger with a lion?能不能让老虎和狮子交配?
If you cross soft wheat with hard wheat you can produce flour suitable for making bread.如果你把软麦和硬麦杂交,你就可以生产出适于制作面包的面粉。
3.与(某人)发生(友好的)争论 start a difference of opinion, often friendly, with (sb)
▲cross swords with sb
They cross verbal swords with each other.他们彼此唇枪舌剑地交锋。
A member of the club crossed swords with the boss at the beginning of the meeting.会议刚开始,一位俱乐部成员就与老板争论起来。

cross the Rubicon
孤注一掷,破釜沉舟 stake all on a single throw; cut off all means of retreat
I began to steady the palsy of my nerves and to feel that the Rubicon was crossed.我开始镇定下来,觉得大势已定。

用作不及物动词
▲S+～(+A)
I'll meet you where the roads cross.我将在十字路口和你见面。
The roads cross at the People's Square.这两条路在人民广场交叉。
They crossed from England to France.他们从英国渡过海峡到法国去。
用作及物动词
▲S+～+n./pron.
We have to cross the railway line by the foot bridge.我们不得不从人行桥上越过铁路线。
The bridge crosses the river at its narrowest point.桥在河面最窄处横跨而过。
Line A crosses line B at right angles.A线与B线成直角相交。
If I cross his path,I'll tell him to return the book.如果我碰见他,我要叫他还书。
We crossed each other on the way.我们在途中错过去了。
Cross me and you'll regret it.和我作对,你会后悔的。
He becomes very angry if anyone crosses him.如果有谁反对他,他就会很生气。
He crossed me in everything.他事事同我作对。
◇ 用于be ～ed结构
The river is crossed by a bridge.河上架着一座桥。

cross one's heart, cross one's mind, cross oneself
这三个短语的意思不同,短语cross one's heart和cross oneself的意思是“在胸前画十字”,用来表达忠诚、老实,用于本义; 而cross one's mind的意思是“突然想起”,用于比喻义。例如:
The prisoner crossed his heart and said that he was innocent.这个犯人在胸前划了个十字,说自己是无辜的。
She crossed herself as she left the church.她离开教堂时,在自己身上画十字。
It never crossed my mind that he might refuse the request.我从未料到他会拒绝这个要求。
cross, across
参见across条。

cross the Rubicon源出古罗马凯撒公元前49年孤注一掷率军渡过卢比孔河与庞贝决战。

1.cross用作名词的基本意思是指基督被钉死在上面的“十字架”。引申可表示用作基督徒标记的“十字架模型”以及类似十字架的大多数物体,还可指基督徒用右手画十字的这一动作。cross引申还可表示“杂交品种”“混合物”“痛苦,苦难”等。
2.cross作“十字架”“画十字的动作”“杂交品种”“混合物”等解时,通常用单数形式。

Jesus died on the cross.耶稣死在十字架上。
Kehr wore a tiny golden cross.凯尔佩挂着一枚小小的金十字架。
They mark them with a red cross.他们用一个红十字标出它们。
There is a wooden cross on his grave.在他的坟头上有一个木头十字架。
He was awarded a cross for gallantry in combat.他由于在战斗中表现英勇而被授予一枚十字勋章。
I could not write my name, so I make the sign of the cross.我不会写我的名字,就画了一个十字。
The reader has to indicate, with a cross or a tick, the answer.读者必须打叉或打钩标出答案。
Mother told me to cut the cloth on the cross.妈妈叫我把布对角剪开。
A mule is a cross between a mare and a donkey.骡子是雌马和驴生出的杂种。
The drink tasted like a cross between coffee and hot chocolate.这饮料喝起来像是咖啡和巧克力的混合物。
This play is a cross between farce and tragedy.这是一部把闹剧和悲剧结合为一体的戏。
We all have our cross,I suppose.我想我们大家都有苦难。

1.cross用作形容词的基本意思是“坏脾气的,易怒的”,一般用于非正式文体。常与介词with〔at〕连用表示“对某人生气”,与about连用表示“对某事感到生气”。cross还可表示“相反的,反向的”,常用于指风的方向; 与介词to连用时,则往往表示与某一抽象事物的方向相反,如思想、观念等。
2.cross的比较级是crosser,最高级是crossest。

cross to
与…相反 opposite to
It was just a result cross to our purpose.这恰恰是与我们的目的相反的结果。
I have an idea cross to theirs.我有一个与他们的主张相反的想法。

用作定语
▲～+n.
The cross and hungry children came in.又气又饿的孩子们走了进来。
She gave me a cross look.她瞪了我一眼。
The strong cross wind makes it difficult for our boat to leave harbour.逆风很强,刮得我们的船无法离港。
用作表语
▲S+be+～+prep.-phrase
I'm sorry I was cross at you yesterday.对不起,我昨天对你态度不好。
It's no good getting cross at her.跟她发火没有用。
Mother was really cross with me when I broke the window.我把窗子打破时,妈妈真的生气了。
For goodness' sake, don't go near her, she's as cross as too sticks.看在老天爷面上,别到她身边去,她非常生气。

［同义词］ v. go across, traverse, transit, frustrate, oppose, thwart adj. annoyed, ill-natured, irritable,testy
［反义词］ adj. cheerful, good-natured
［词源］  ＜古英语cros＜古爱尔兰语cross＜拉丁语cruz(十字架,叉子)