lanch verb 2noun 1forms 3 verb2 •(no longer used) To throw, as a lance; to let fly; to launch. •(no longer used) To pierce, as with a lance; to lance.And gainst the General we will lift our swords And either lanch his greedie thirsting throat, Or take him prisoner, and his chaine shall serue For Manackles, till he be ransom’d home. — 1587 noun1 •(dialect, UK) A large bed of flints.[…] difficult to cultivate, on account of the outcrop thereon of a large bed of flints called locally a 'lanch' or 'lanchet.' — 1871 formslanched · lanching · lanches