Core sense — he effaced it, he erased it, he cancelled itgenerated
1.1
He effaced, erased, or cancelled it; he removed its impression or trace.
1.1.1the wind dispelled the clouds—مَحَتِ الرِّيحُ عَنْهُ الأَسْقَامَ وَالدُّنُوبَ
1.1.2daybreak dispelled the night—مَحَا الصُّبْحُ اللَّيْلَ
1.1.3[God removed from him diseases and sins, as though He cancelled them]—مَحَاٱللّٰهُ عَنْهُ الأَسْقَامَ وَالدُّنُوبَ
Given in the article on عفو.
1.1.4beneficence effaces, or cancels, evil conduct—الإِحْسَانُ يَمْحُو الإِسَآءَةَ
Qur’ānic occurrences Form 1
13:39
يَمْحُوا۟ ٱللَّهُ مَا يَشَآءُ وَيُثْبِتُ ۖ وَعِندَهُۥٓ أُمُّ ٱلْكِتَـٰبِAllah doth blot out or confirm what He pleaseth: with Him is the Mother of the Book.
17:12
وَجَعَلْنَا ٱلَّيْلَ وَٱلنَّهَارَ ءَايَتَيْنِ ۖ فَمَحَوْنَآ ءَايَةَ ٱلَّيْلِ وَجَعَلْنَآ ءَايَةَ ٱلنَّهَارِ مُبْصِرَةً لِّتَبْتَغُوا۟ فَضْلًا مِّن رَّبِّكُمْ وَلِتَعْلَمُوا۟ عَدَدَ ٱلسِّنِينَ وَٱلْحِسَابَ ۚ وَكُلَّ شَىْءٍ فَصَّلْنَـٰهُ تَفْصِيلًاWe have made the Night and the Day as two (of Our) Signs: the Sign of the Night have We obscured, while the Sign of the Day We have made to enlighten you; that ye may seek bounty from your Lord, and that ye may know the number and count of the years: all things have We explained in detail.
42:24
أَمْ يَقُولُونَ ٱفْتَرَىٰ عَلَى ٱللَّهِ كَذِبًا ۖ فَإِن يَشَإِ ٱللَّهُ يَخْتِمْ عَلَىٰ قَلْبِكَ ۗ وَيَمْحُ ٱللَّهُ ٱلْبَـٰطِلَ وَيُحِقُّ ٱلْحَقَّ بِكَلِمَـٰتِهِۦٓ ۚ إِنَّهُۥ عَلِيمٌۢ بِذَاتِ ٱلصُّدُورِWhat! Do they say, "He has forged a falsehood against Allah"? But if Allah willed, He could seal up thy heart. And Allah blots out Vanity, and proves the Truth by His Words. For He knows well the secrets of all hearts.
Occurrences of this form in the Qur’ān, not Lane’s choice of verse. They show the word in use; they do not say which sense above applies. Where more occur than are shown, the shortest āyāt are chosen.
Show Lane's original text
He effaced, erased, rased, obliterated, or cancelled, it; removed, or did away with, its impression or trace. (K.) مَحَتِ الرِّيحُ عَنْهُ الأَسْقَامَ وَالدُّنُوبَ The wind made to pass away, or dispelled, the clouds. (TA.) مَحَا الصُّبْحُ اللَّيْلَ Daybreak dispelled the night. (TA.) مَحَاٱللّٰهُ عَنْهُ الأَسْقَامَ وَالدُّنُوبَ [God removed from him diseases and sins; as though He cancelled them]. (Msb in art. عفو .) الإِحْسَانُ يَمْحُو الإِسَآءَةَ Beneficence effaces, obliterates, or cancels, evil conduct. (TA)