1.dictionary的基本意思是“词典,字典”,指按一定顺序如字母表等排列的,包括拼写、发音、词性、词形变化、释义、用法及词源等方面内容的工具书。
2.在表示“查字典”时, dictionary须用动词consult, search, turn up或use,不可用look for, look for的宾语可以是词,但不可以是“词典”。
3.在表示“关于某方面的词典”时, dictionary后面接介词of,而不接介词on, about。

No dictionary is perfect.没有一本词典是十全十美的。
The dictionary is full to overflowing with new words.这本词典的新词丰富极了。
This dictionary is very helpful to your English study.这部词典对你学习英语很有帮助。
A good dictionary is indispensable for learning a foreign language.一本好字典是学习外语必不可少的。
This dictionary is specially intended for people whose native tongue is not English.这部词典是专为母语不是英语的人编写的。
The small pocket dictionary was expanded into a full-sized one.那本袖珍词典已扩展成为一本大型词典。
The dictionary is close at hand.词典就在旁边。
To many people a dictionary is a useful but a bleak compendium.在许多人看来,词典是一种有用但乏味的工具书。
I have three dictionaries.我有三本字典。
I bought a compact dictionary last month.我上月买了一本袖珍字典。
I need a useful dictionary.我需要一本有用的字典。
This book is a dictionary.这是一部字典。
There is a table of contents in the front of a dictionary.词典的开头有目录。
The word “aberrant” is absent in this dictionary.这本词典没有aberrant这个词。
The head-words in this dictionary are printed in bold type.这部词典的词目是用黑体字排印的。
Every word in this dictionary is important.这本字典每一个词都很重要。
There was a dictionary with several pages missing.有一本字典少了几页。
The yearly supplements keep a dictionary up-to-date.逐年的增补使这部词典的内容能跟上时代的发展。
You'd better look it up in the dictionary.你最好查一下词典。
This is a dictionary of place names.这是一本关于地名的词典。

下面两句意思相同:
I consulted several dictionaries, but failed
to find the word.
I looked for the word in several dictionaries,
but failed to find it.
我查了几部词典但都没有查到这个词。

［词源］  ＜中古拉丁语dieclionrium＜近代拉丁语dictio(词)