too

[too] /tu/

adverb

in addition; also; furthermore; moreover:

young, clever, and rich too.

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

too sick to travel.

more, as specified, than should be:

too near the fire.

(used as an affirmative to contradict a negative statement):

I am too!

extremely; very:

She wasn't too pleased with his behavior.

Idioms

only too. only (def 10).

Origin

before 900; Middle English to, Old English, stressed variant of to (adv.); spelling too since the 16th century

Can be confused

to, too, two.

Examples from the web for too

Others have suggested that the hosts either can't recognize foreign eggs or are too small to remove them.
Nothing-yet-has been tested in humans, so don't get too excited.
With the invention of photography, it became the business of the photographer too.
too often, such protests are going unheard among collectors.
Then the police said it was too dangerous to walk around the neighborhood alone toting expensive camera gear.
The combination of virtues-musical, intellectual, personal-is simply too implausible.
It is too quaint, too precious for that, but it is a place to breathe.
So the basic story may be, if anything, a bit too familiar.
Mistletoe would only be placed in aristocratic homes because it would be much too expensive for the average family to buy.
We're not going to want to eliminate executive power or even inhibit the president to too great an extent.

British Dictionary definitions for too

too

/tuː/

adverb

as well; in addition; also: can I come too?

in or to an excessive degree; more than a fitting or desirable amount: I have too many things to do

extremely: you're too kind

(US & Canadian, informal) indeed: used to reinforce a command: you will too do it!

(Brit & Austral, NZ) too right!, certainly; indeed

very

Word Origin

Old English tō; related to Old Frisian, Old Saxon to, Old High German zou; see to1

Word Origin and History for too

adv.

"in addition, in excess," late Old English, stressed variant of Old English prep. to "in the direction of, furthermore" (see to). The spelling with -oo is first recorded 1590. Use after a verb, for emphasis (e.g. did, too!) is attested from 1914. German zu unites the senses of English to and too. Slang too-too "excessive in social elegance" first recorded 1881. Too much "excellent" first recorded 1937 in jazz slang.