and (ənd, ən; ănd when stressed)
1. Together with or along with; in addition to; as well as. Used to connect words, phrases, or clauses that have the same grammatical function in a construction.
2. Added to; plus: Two and two makes four.
3. Used to indicate result: Give the boy a chance, and he might surprise you.
4. Informal Used after a verb such as come, go, or try to introduce another verb describing the purpose of the action: come and see; try and find it. See Usage Note at try.
5. Archaic If: and it please you.
An addition or stipulation: The offer is final—no ifs, ands, or buts.
and so forth/on
1. And other unspecified things of the same class: bought groceries, went to the bank, picked up the dry cleaning, and so forth.
2. Further in the same manner.
and then some Informal
With considerably more in addition: This project will take all our skill and then some.
[Middle English, from Old English; see en in the Appendix of Indo-European roots.]
Usage Note: A traditional grammatical rule asserts that sentences beginning with and or but express "incomplete thoughts" and are therefore incorrect. But this stricture has been ignored by writers from Shakespeare to Joyce Carol Oates, and most of the Usage Panel sees wisdom in this attitude. In our 1988 survey, when asked whether they paid attention to the rule in their own writing, 24 percent answered "always or usually," 36 percent answered "sometimes," and 40 percent answered "rarely or never." See Usage Notes at both, but, with.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.
American Heritage Dictionary Products
The American Heritage Dictionary, 5th Edition
The American Heritage Dictionary of Idioms
The American Heritage Roget's Thesaurus
Curious George's Dictionary
The American Heritage Children's Dictionary
The American Heritage Dictionary of Indo-European Roots
The American Heritage Student Grammar Dictionary
The American Heritage Desk Dictionary + Thesaurus
The American Heritage Science Dictionary
The American Heritage Dictionary of Business Terms
The American Heritage Student Dictionary
The American Heritage Essential Student Thesaurus