Etimology
From Middle English to (“also, in addition to”), from Old English tō (“furthermore, also, besides”), adverbial use of preposition tō (“to, into”). The sense of "in addition, also" deriving from the original meaning of "apart, separately" (compare Old English prefix tō- (“apart”)). Doublet of to; see there for more.
adverb
too (not comparable)
(focus) Likewise.
(conjunctive) Also; in addition.
(degree) To an excessive degree; over; more than enough.
(degree, colloquial) To a high degree, very.
(emphatic, colloquial, childish) Used to contradict a negative assertion with present and simple past forms of be, do, and auxiliary verbs
(archaic, colloquial) Used for emphasis, without reference to any previous statement.
Examples
The preposterous altruism too! […] Resist not evil. It is an insane immolation of self—as bad intrinsically as fakirs stabbing themselves or anchorites warping their spines in caves scarcely large enough for a fair-sized dog.
The use of algorithms in policing is one example of their increasing influence on our lives. And, as their ubiquity spreads, so too does the debate around whether we should allow ourselves to become so reliant on them – and who, if anyone, is policing their use.
There has been a cutback in federal subsidies. Rates have been increasing too.
They burned the old gun that used to stand in the dark corner up in the garret, close to the stuffed fox that always grinned so fiercely. Perhaps the reason why he seemed in such a ghastly rage was that he did not come by his death fairly. Otherwise his pelt would not have been so perfect. And why else was he put away up there out of sight?—and so magnificent a brush as he had too.
Hidden behind thickets of acronyms and gorse bushes of detail, a new great game is under way across the globe. Some call it geoeconomics, but it's geopolitics too. The current power play consists of an extraordinary range of countries simultaneously sitting down to negotiate big free trade and investment agreements.
[…] purſued his vnneighbourly purpoſe in ſuch ſort: that hee being the ſtronger perſwader, and ſhe too credulous in beleeuing or elſe ouer-feeble in reſiſting, from priuate imparlance, they fell to action; and continued their cloſe fight a long while together, vnſeene and vvithout ſuſpition, no doubt to their equall ioy and contentment.
The dawn of the oil age was fairly recent. Although the stuff was used to waterproof boats in the Middle East 6,000 years ago, extracting it in earnest began only in 1859 after an oil strike in Pennsylvania. […] It was used to make kerosene, the main fuel for artificial lighting after overfishing led to a shortage of whale blubber. Other liquids produced in the refining process, too unstable or smoky for lamplight, were burned or dumped.
She doesn't talk too much. I'm not too sure about this.
Synonym: so
You're not old enough yet. ― I am too!
You can't jump that fence. ― Can too jump it!
We haven't been mean to you. ― Have too, plenty of times
The trooper thanks his informant and rides slowly on, looking about him. […] He comes to a gateway in the brick wall, looks in, and sees a great perplexity of iron lying about in every stage and in a vast variety of shapes— […] "This is a place to make a man's head ache too!" says the trooper, looking about him for a counting-house.
Related words
synonyms
(likewise, also): as well, along with, eke (obsolete)
(over, more than enough): excessively, extremely, overmuch, unnecessarily