0 to have the physical defect of having the eyes turning towards or away from each other or to cause the eyes to do this -- (essere strabico)
1 (with at, up at, through etc) to look with half-shut or narrowed eyes -- (guardare socchiudendo gli occhi)
He squinted through the telescope.
2 a squinting position of the eyes -- strabismo
an eye-operation to correct her squint.
3 a glance or look at something -- occhiata
Let me have a squint at that photograph.
4 (placed etc) crookedly or not straight -- storto
Your hat is squint.