Synonyms of lengthy in English:

lengthy


See definition of lengthy

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