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The Collaborative International Dictionary
Leger line

Leger \Leg"er\, a. [F. l['e]ger, fr. LL. (assumed) leviarius, fr. L. levis light in weight. See Levity.] Light; slender; slim; trivial. [Obs. except in special phrases.]
--Bacon.

Leger line (Mus.), a line added above or below the staff to extend its compass; -- called also added line.

Wiktionary
leger line

n. (alternative form of ledger line English)

WordNet
leger line

n. a short line; a notation for extending the range above or below the staff [syn: ledger line]