Wiktionary (0.00 / 0 votes) Rate this definition: infinity (Noun). Limitlessness, unlimitedness, something which is growing without limits or bounds. infinity (Noun). A number that has an infinite numerical value that cannot be counted.
prodrome - an early symptom that a disease is developing or that an attack is about to occur. prodroma. symptom - (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease. Translations.
Home Teaching and Learning Educational Psychology Zone of Proximal Development. The zone of proximal development (sometimes abbreviated ZPD), is the difference between what a learner can do without help and what he or she can do with help. It is a concept developed by Soviet psychologist and social constructivist Lev Vygotsky (1896 - 1934).