简明英汉词典

 onto
[5Cntu]
prep.
在...之上

美国传统词典[双解]

 onto
on.to
AHD:[?n“t?”, -t…, ?n“-]
D.J.[6%n7tu8, -t*, 6%8n-]
K.K.[6$n7tu, -t*, 6%n-]
prep.（介词）

(1)

 On top of; to a position on; upon:
到…之上：在…顶端；在一位置上；在…上面：
The dog jumped onto the chair.See Usage Note at on
这条狗跳到了椅子上面参见 on

(2)

 Informal Fully aware of; informed about:
【非正式用语】 知晓：非常熟悉；了解：
The police are onto the robbers' plans.
警察局都清楚抢劫犯的阴谋
adj.Mathematics （形容词）【数学】
Of, relating to, or being a mapping such that every element of the set referred to is the image of an element in another.
映成的：一集合中的每一元素，经映象后为另一集合至少一元素的象的；与之有关的；或成为象的

现代英汉词典

 onto
[5RntJ]
prep.
到…上；在…上
He step out of the train onto the platform
下火车踏上站台

现代英汉综合大辞典

 onto
[5Cntu]
prep.

(1)

 到...上

(2)

 [俚] 对...心中有数
get onto a horse
骑到马上
jump onto the stage
跳到台上
be onto sb. [sth.]
充分了解某人[某事]

词性变化

 onto
adj.

(1)

 【数】映成的
onto function
映成函数

(2)

 【说明】①在美国口语中 onto有时单独代替on或to, 例如: They finally got onto (=on) the bus. 他们最后上了公共汽车。The crowd got onto (=to) the street. 那群人来到了街上。②on和to遇有独立意义时, 在美语中也不连写, 如: They drove on to the town. 他们开车直到镇上。

用法词典

 onto
(辅音前) (on to)

美国传统词典

 onto
on.to
AHD:[?n“t?”, -t…, ?n“-]
D.J.[6%n7tu8, -t*, 6%8n-]
K.K.[6$n7tu, -t*, 6%n-]
prep.

(1)

 On top of; to a position on; upon:
The dog jumped onto the chair.See Usage Note at on

(2)

 Informal Fully aware of; informed about:
The police are onto the robbers' plans.
adj.Mathematics
Of, relating to, or being a mapping such that every element of the set referred to is the image of an element in another.

英汉化学大词典

 onto
prep.向,到...上,在...上

英汉经贸大词典

 onto
n.在...上

英汉计算机大词典

 onto
prep.向(到...上,在...上);n.到...上面(向...方面)