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HOW TO USE THE DICTIONARY

Learn what the dictionary tells you about words.

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Some compound words (like bus rapid transit, dog whistle, or identity theft) don’t appear on the drop-down list when you enter them into the search window. If a compound term doesn’t appear in the drop-down list, try entering the term into the search window and then hit the search button (instead of the “enter” key). Alternatively, begin searches for compound terms with a quotation mark.

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THE USAGE PANEL

The Usage Panel is a group of nearly 200 prominent scholars, creative writers, journalists, diplomats, and others in occupations requiring mastery of language. The Panelists are surveyed annually to gauge the acceptability of particular usages and grammatical constructions.

The Panelists

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Go to our Crossword Puzzle Solver and type in the letters that you know, and the Solver will produce a list of possible solutions.

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AMERICAN HERITAGE DICTIONARY APP

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INDO-EUROPEAN & SEMITIC ROOTS APPENDICES

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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OPEN DICTIONARY PROJECT

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See word lists from the best-selling 100 Words Series!

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100 Words
100 Words Every High School Freshman Should Know

Does your vocabulary measure up? A confident command of a growing vocabulary is one of the best indicators of achievement in school.

Building on the success of the popular 100 Words Every High School Graduate Should Know, the editors of the American Heritage® Dictionaries are pleased to introduce a new list of words geared toward the reading level expected of high school freshmen. With its attractive format and thoughtful word selection, 100 Words Every High School Freshman Should Know will spur students to add new words to their vocabularies as they make the important transition from middle school to high school.


The following is the entire list of 100 words:

accentuate
alliteration
analogy
antibody
aspire
bamboozle
bizarre
boisterous
boycott
camouflage
chronology
commemorate
cower
decorum
deduction
deign
despondent
dialogue
divulge
eclectic
ellipse
embargo
enthusiastic
exponent
exult
fallacy
flourish
formidable
gargoyle
guerrilla
guru
heritage
hieroglyphic
hologram
hypocrisy
immune
impertinent
inference
introspection
jaunty
jovial
kilometer
labyrinth
laconic
lichen
light-year
maneuver
marsupial
metaphor
mosaic
mutation
nebula
nocturnal
nuisance
omnivore
outrageous
ozone
parasite
participle
phloem
plateau
polygon
protagonist
pulverize
quandary
quarantine
quota
rainforest
random
recede
renaissance
renegade
repose
sacrifice
silhouette
solstice
spectrum
stereotype
strategy
suffrage
symbiosis
tariff
technique
tempo
toxin
tranquility
tumult
tundra
ultraviolet
unanimous
undulate
vaccine
vacillate
vertebrate
virtuoso
voracious
wretched
xylem
yacht
zoology


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