noun

LEM

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LEM (noun) means the Lunar (Excursion) Module, the spacecraft that carried astronauts down to the Moon's surface during the Apollo missions. Example: “The LEM undocked from the command module and began its descent.”

noun

The Lunar (Excursion) Module, the spacecraft that carried astronauts down to the Moon's surface during the Apollo missions.

"The LEM undocked from the command module and began its descent."

Short for the law of excluded middle, the logical principle that a statement must be either true or false, with no third option.

"Some non-classical logics reject LEM entirely."

How to use LEM

Learner’s notes

In plain EnglishUsually an abbreviation — either for the Apollo Moon-landing craft, or, in logic and philosophy, for the rule that every statement is either true or false.

When to use it

Technical/specialist term in both senses; rarely used outside spaceflight history or logic.

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C2 · Advanced serendipity Fortunate discoveries made entirely by accident.

Gen Z slang rizz Charm — the ability to attract a romantic interest.

B2 · Intermediate empathy The capacity to share another person’s feelings.

C1 · Advanced nonchalant Casually calm and relaxed; unconcerned.

Internet slang delulu Delusional — believing something against the odds.

Etymology nostalgia Greek nostos “return home” + algos “pain”.

C2 · Advanced serendipity Fortunate discoveries made entirely by accident.

Gen Z slang rizz Charm — the ability to attract a romantic interest.

B2 · Intermediate empathy The capacity to share another person’s feelings.

C1 · Advanced nonchalant Casually calm and relaxed; unconcerned.

Internet slang delulu Delusional — believing something against the odds.

Etymology nostalgia Greek nostos “return home” + algos “pain”.

Word forms

Plural: LEMs

Test yourself on “LEM” A quick quiz — meaning, synonyms & usage →

Fill the gap

Can you complete this real example?

The _____ undocked from the command module and began its descent.

Etymology

As a Dutch and North Germanic surname, this is a shortened form of Lambrecht or Lempert (see Lambert). As a Chinese surname, it is a spelling variant of Lim.

Synonyms

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lunar module lunar excursion module

Rhymes for LEM

clem

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Frequently asked questions

What does “LEM” mean?

The word “LEM” means the Lunar (Excursion) Module, the spacecraft that carried astronauts down to the Moon's surface during the Apollo missions. In plain terms, usually an abbreviation — either for the Apollo Moon-landing craft, or, in logic and philosophy, for the rule that every statement is either true or false.

How do you use “LEM” in a sentence?

Here is “LEM” used in a sentence: “The LEM undocked from the command module and began its descent.”

What part of speech is “LEM”?

“LEM” is a noun.

How many meanings does “LEM” have?

“LEM” has 2 distinct senses listed in this dictionary. The most common is: the Lunar (Excursion) Module, the spacecraft that carried astronauts down to the Moon's surface during the Apollo missions.