Definition of lah in English:

lah

(also la)

noun

Music
  • 1(in tonic sol-fa) the sixth note of a major scale.

    1. 1.1 The note A in the fixed-doh system.

Origin

Middle English: representing (as an arbitrary name for the note) the first syllable of Latin labii, taken from a Latin hymn (see solmization).

Pronunciation

lah

/lɑː/