Core sense — a receptacle, a bag for travelling-provisionsgenerated
1
A [bag, or wallet, or] receptacle for travelling-provisions, and for goods or utensils and the like; a vessel (?).
1.1[The pericardium]—وِعَآءُ القَلْبِ
Mentioned under the word فُؤَادٌ.
1.2figurative · مجاز — inferredI showed him what was in my heart—بَتَثْتُ لَهُ مَا فِى وِعَائِى
Er-Rāghib gives this, in arts. شكو and شكى.
1.3[The adverbial particle فِى]—حَرْفُ الوِعَآءِ
So according to IB, in art. وسط.
Qur’ānic occurrences وِعَآء
12:76
فَبَدَأَ بِأَوْعِيَتِهِمْ قَبْلَ وِعَآءِ أَخِيهِ ثُمَّ ٱسْتَخْرَجَهَا مِن وِعَآءِ أَخِيهِ ۚ كَذَٰلِكَ كِدْنَا لِيُوسُفَ ۖ مَا كَانَ لِيَأْخُذَ أَخَاهُ فِى دِينِ ٱلْمَلِكِ إِلَّآ أَن يَشَآءَ ٱللَّهُ ۚ نَرْفَعُ دَرَجَـٰتٍ مَّن نَّشَآءُ ۗ وَفَوْقَ كُلِّ ذِى عِلْمٍ عَلِيمٌSo he began (the search) with their baggage, before (he came to) the baggage of his brother: at length he brought it out of his brother's baggage. Thus did We plan for Joseph. He could not take his brother by the law of the king except that Allah willed it (so). We raise to degrees (of wisdom) whom We please: but over all endued with knowledge is one, the All-Knowing.
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
A [bag, or wallet, or] receptacle, for travelling-provisions, and for goods or utensils, &c.: (S, MA:) a vessel (?). وِعَآءُ القَلْبِ [The pericardium]. (TA, voce فُؤَادٌ .) بَتَثْتُ لَهُ مَا فِى وِعَائِى I showed him what was in my heart. (Er-Rághib, TA, in art. شكو and شكى .) حَرْفُ الوِعَآءِ [The adverbial particle فِى ]. (IB, in TA, art. وسط .)