1. Adjective In a Bitter argument or conflict, people argue very angrily or fight very fiercely.the scene of Bitter fighting during the Second World War.

2. According to him, the couple had a bitter argument in which they exchanged insults, but there is no mention of physical violence (Rangel 1928, pp. 162–163; Calmon 1975, pp. 14–15; Costa 1995, pp. 86).

3. Bitter chocolate see thesaurus at taste 5 COLD DN COLD unpleasantly cold → Bitterly a Bitter wind the Bitter cold of the Midwestern winters 6 → to the Bitter end 7 → a Bitter pill (to swallow) — Bitterness noun [uncountable] COLLOCATIONS – Meaning 3: a Bitter argument, battle etc is one in which people oppose or criticize each other