Synonyms of lengthy in English:

lengthy


See US English definition of lengthy

See UK English definition of lengthy

See Spanish definition of largo

adjective

1‘a lengthy civil war’

SYNONYMS
long, very long, of considerable length, long-lasting, prolonged, extended, extensive
ANTONYMS

short

2‘the board held lengthy discussions on the report’

SYNONYMS
protracted, very long, overlong, long-drawn-out
diffuse, discursive, verbose, wordy, garrulous, prolix, long-winded, ponderous, digressive, rambling, dragged out
tedious, boring, interminable, wearisome
ANTONYMS

brief, concise