名詞 dot:

1. a very small circular shape
   同義詞：point
2. the United States federal department that institutes and coordinates national transportation programs; created in 1966
   同義詞：Department of Transportation, Transportation
3. the shorter of the two telegraphic signals used in Morse code
   同義詞：dit
4. street name for lysergic acid diethylamide
   同義詞：acid, back breaker, battery-acid, dose, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen

動詞 dot:

1. scatter or intersperse like dots or studs
   同義詞：stud, constellate
2. distribute loosely
   同義詞：scatter, sprinkle, dust, disperse
3. make a dot or dots
4. mark with a dot

1. He watched the train away until it was only a dot in the distance.
   他目送著列車駛去，直到它成了遠方的一個小黑點。
2. The lake was dotted with little boats.
   湖面上布滿了小船。
3. The train arrived on the dot of three o'clock.
   那輛火車三點鐘準時到達。

dot

n.（名詞）

A tiny round mark made by or as if by a pointed instrument; a spot.
點：由或象有尖頭器具標記的小圓點；點
Such a mark used in orthography, as above ani.
小點：用于正字法中的小點，例如i 上部分
A tiny amount.
少量
In Morse and similar codes, the short sound or signal used in combination with the dash and silent intervals to represent letters, numbers, or punctuation.
莫爾斯電碼點：在莫爾斯電碼或類似電碼中，用長劃及無音間隔與短音或符號結合起來表示字母、數(shù)字或標點
Mathematics
【數(shù)學】
A decimal point.
小數(shù)點
A symbol of multiplication.
乘號
Music A mark after a note indicating an increase in time value by half.
【音樂】 頓音標記，附點：音符后面的標記，表明增加半拍
v.（動詞）
dot.ted,dot.ting,dots
v.tr.（及物動詞）
To mark with a dot.
標記：以點做標記
To form or make with dots.
虛線：用點形成或構成
To cover with or as if with dots:
點綴：用或似用點布滿：
例句：
.Campfires, like red, peculiar blossoms, dotted the night.(Stephen Crane)
.營火象紅色的、別致的花朵點綴著黑夜.(斯蒂芬·克蘭)

v.intr.（不及物動詞）
To make a dot.
加點

<習慣用語>on the dot 或
at the dot
Exactly at the appointed time; punctual or punctually:
準時：正好在指定時間的；準時的或準時地：
例句：
arrived at nine o`clock on the dot.
于九點準時到達

來源：
Middle English *dot
中古英語 *dot
from Old English dott [head of a boil]
源自 古英語 dott [沸點]

【引伸】
dot.ter
n.（名詞）

---------------另--------------
dot
dot 2

n.（名詞）
A woman`s marriage portion; a dowry.
女人的陪嫁；嫁妝

來源：
French
法語
from Latin dôs dôt- [dowry] * see dô-
源自 拉丁語 dôs dôt- [嫁妝] *參見 dô-

【引伸】
do.tal