noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A plug-in.
2. 2
   a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities wordnet

Synonyms

All synonyms

plug-inadd-onboardcardcircuit boardcircuit card

Etymology

From add + in.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.