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
semaphore
1 ENTRIES FOUND:
semaphore
(noun)
semaphore
/
ˈ
sɛməˌfoɚ/
noun
semaphore
/
ˈ
sɛməˌfoɚ/
noun
Britannica Dictionary definition of SEMAPHORE
[
noncount
]
:
a system used for sending signals by using two flags that are held in your hands
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
replenish
:
to fill or build up (something) again (
somewhat formal
)
Learn More »