A period of time in which a person is kept very highly sexually aroused, with or without orgasms, the intensity can differ per period of time.
He kept his girl aroused for the whole weekend, he started by stimulating her by flirting
and dirty talk
, so she reached plateau. The plateau was prolonged to even a higher level by orgasm
after orgasm and never giving her the chance to come down again, finally she was plateau on a very high level, she couldn't think anymore and was only longing for a cock