i+1

English

Etymology

Ostensibly coined by Stephen Krashen in his Explorations in Language Acquisition and Use in 2003; but possibly earlier. Originally, referred to a subsequent word (the 1) added to an existing vocabulary of i words, i.e. the i+1th word learned by the learner. (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Pronunciation

The same as I plus one.

Adjective

i+1 (not comparable)

1. (linguistics, of a sentence) Containing only a single word unknown to the listener or reader.

   Our SRS provides automatic i+1 sentence cards for optimal study.

Noun

i+1 (uncountable)

1. (linguistics) The existence of only one word unknown to the reader or listener of a sentence.

   When enough comprehensible input is provided, i+1 is present.