ultrashort adjective 4noun 1forms 1 adjective4 •Extremely short in duration, typically on the femtosecond scale •Having a very short term of investment, typically less than a year •(informal) Very short.ultrashort skirts •Having a wavelength of between 1 and 10 metres noun1 •A bond with an extremely short term, typically less than a yearUltrashorts were a way for the fund industry to appeal to bank customers, by offering an investment whose price did not vary much but whose yield was higher than that on certificates of deposit. — 1995 formsultrashorts
