CURDLE Meaning of CURDLE in English vt to congeal or thicken. 2. curdle ·vt to change into curd; to cause to coagulate. 3. curdle ·vi to thicken; to congeal. 4. curdle ·vi to change into curd; to coagulate; as, rennet causes milk to curdle. Webster English vocab. Английский словарь Webster. 2012