Definition of lambda
1 : the 11th letter of the Greek alphabet — see alphabet table
2 : an uncharged unstable elementary particle that has a mass 2183 times that of an electron and that decays typically into a nucleon and a pion
Recent Examples of lambda from the Web
However, the name is trademarked, and the project opted instead for lambda — the Greek letter used to symbolize wavelength.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lambda'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of lambda
Middle English, from Greek, of Semitic origin; akin to Hebrew lāmedh lamed
First Known Use: 15th centurySee Words from the same year
Learn More about lambda
Britannica.com: Encyclopedia article about lambda
Seen and Heard
What made you want to look up lambda? Please tell us where you read or heard it (including the quote, if possible).