The Britannica Dictionary
mobile search
Home
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
×
Britannica Homepage
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
The Britannica Dictionary
LSD
1 ENTRIES FOUND:
LSD
(noun)
LSD
/ˌɛlˌɛs
ˈ
diː/
noun
LSD
/ˌɛlˌɛs
ˈ
diː/
noun
Britannica Dictionary definition of LSD
[
noncount
]
:
an illegal drug that causes people to see and hear things that do not really exist
ASK THE EDITOR
What are the plural forms of
check-in
,
passerby
, and
spoonful
?
See the answer »
QUIZZES
Vocabulary Quiz
Test your word power
Take the Quiz »
Name That Thing
Take our visual quiz
Test Your Knowledge »
WORD OF THE DAY
emulate
:
to try to be like (someone or something you admire)
Learn More »
