L1 Definition

noun
Mother tongue (someone's native language)
Wiktionary
abbreviation
(astrophysics) First Lagrange point, located further in towards the primary of a system where a smaller object orbits a larger one, in front of the smaller object, inline with a line drawn through the centres of the larger and smaller objects.
Wiktionary

Other Word Forms of L1

Noun

Singular:
l1
Plural:
l1s

Origin of L1

  • From language 1, meaning "first language."

    From Wiktionary