Wiktionary
n. (context linguistics English) A cover term for a wide variety of phonological processes that occur at morpheme or word boundaries, such as the fusion of sounds across word boundaries and the alteration of sounds due to neighboring sounds or due to the grammatical function of adjacent words.
WordNet
n. the articulatory process whereby the pronunciation of a word or morpheme changes when it is followed immediately by another (especially in fluent speech)
Wikipedia
Sandhi ( Sanskrit: संधिः "joining") is a cover term for a wide variety of phonological processes that occur at morpheme or word boundaries (thus belonging to morphophonology). Examples include the fusion of sound across word boundaries, as its name implies, and the alteration of sounds from nearby sounds or the grammatical function of adjacent words.
Sandhi occurs particularly prominently in the phonology of Indian languages (especially Sanskrit, Telugu Marathi, Hindi, Pali, Kannada, Bengali). However, it exists in many other languages.
Usage examples of "sandhi".
The ideo graphic symbols of written Sandhi were incomprehensible to her, but she was learning the spoken language from tapes that heightened recall while she listened.
Jerusha was suddenly glad that she had spent the last month of sleepless nights listlessly learning spoken Sandhi for this occasion.
Foster lay behind a short clump of bushes, scoping out the large compound that lay sheltered in the sandhis latest target.