Dictionary.com
Thesaurus.com
Synonyms

too

American  
[too] / tu /

adverb

  1. in addition; also; furthermore; moreover.

    young, clever, and rich too.

  2. to an excessive extent or degree; beyond what is desirable, fitting, or right.

    too sick to travel.

  3. more, as specified, than should be.

    too near the fire.

  4. (used as an affirmative to contradict a negative statement).

    I am too!

  5. extremely; very.

    She wasn't too pleased with his behavior.


idioms

  1. only too. only.

too British  
/ tuː /

adverb

  1. as well; in addition; also

    can I come too?

  2. in or to an excessive degree; more than a fitting or desirable amount

    I have too many things to do

  3. extremely

    you're too kind

  4. informal indeed: used to reinforce a command

    you will too do it!

  5. certainly; indeed

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

too More Idioms  

Usage

What's the difference between too, to, and two? Too means also (I’m going, too) or to an excessive degree (too much). To is a very common word that performs many different functions, such as expressing direction (I’m driving to the office) or contact (Pin it to the wall), indicating an object or recipient (Give it to me), or setting a range (9 to 5) or limit (These go to 11). Two is the number equal to one plus one.The words are used in very different ways: too is an adverb, to is most commonly used as a preposition, and two is a number that can be used as a noun or an adjective.Perhaps the most common mistake involving the three words is using to when it should be too, or vice versa. Remember, if you mean to, don’t use too many o’s!Here’s an example of too, to, and two used correctly in the same sentence.Example: We went to two two-star restaurants, and it was two two-star restaurants too many!Want to learn more? Read the full breakdown of the difference between too, to, and two.

Etymology

Origin of too

First recorded before 900; Middle English to, Old English, stressed variant of to (for the adverb); spelling too since the 16th century

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Breakfast presenter went on to note that while she and her colleagues had been "so lucky to have you here with us, we forget all the people at home who are your friends too".

From BBC

His coach at Durham, Ryan Campbell, believes he has concentrated too much on bowling wobble-seam deliveries rather than trying to search for swing.

From BBC

But he added: "Rightmove is exploiting a self-evident dominant market position, and are charging too much for it."

From BBC

It seemed like he'd taken a step back, that he wasn't too interested in the sport any longer and might be close to retiring.

From BBC

"However, our modern food environment is too problematic. Instead, people may do best with a more repetitive diet that helps them consistently make healthier choices, even if they might sacrifice some nutritional variety."

From Science Daily