from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A smooth uninterrupted glide in passing from one tone to another, especially with the voice or a bowed stringed instrument.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A smooth, gliding transition from one note to another; used especially with stringed instruments, and sometimes on brass.
from the GNU version of the Collaborative International Dictionary of English
- n. In singing, or in the use of the bow, a gradual carrying or lifting of the voice or sound very smoothly from one note to another; a gliding from tone to tone.
from The Century Dictionary and Cyclopedia
- n. In music for the voice or an instrument of the viol family, a gradual change or gliding from one pitch or tone to another without break or perceptible step.
Italian, from portare, to carry, from Latin portāre.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Italian portamento, from portare ("bear, carry"). (Wiktionary)