tilde

Meaning

1. nounA diacritical mark ⟨˜⟩ placed above a letter to modify its pronunciation. In Spanish, ⟨ñ⟩ is a palatalized ⟨n⟩, for example in ⟨cañón⟩. In Portuguese, ⟨ã⟩ and ⟨õ⟩ are nasalized vowels, for example in ⟨canção⟩. The Vietnamese tone mark dấu ngã, which is placed above a vowel to indicate a creaky rising tone (thanh ngã). The apex, a curved diacritic used in the 17th century to mark final nasalization in the early Vietnamese alphabet. It was an adoption of the Portuguese tilde.
2. nounIn Spanish, ⟨ñ⟩ is a palatalized ⟨n⟩, for example in ⟨cañón⟩.
3. nounIn Portuguese, ⟨ã⟩ and ⟨õ⟩ are nasalized vowels, for example in ⟨canção⟩.

Source: Wiktionary (CC BY-SA 4.0)