Main Entry: in·ter·dig·i·tate Pronunciation: -'dij-&-"tAt Function: intransitive verb Inflected Forms: -tat·ed;-tat·ing 1: to become interlocked like the fingers of folded hands interdigitate with the thin actin filaments —J. M.Squire> 2: to undergo intercuspation interdigitate completely —J. A. Glassman> —in·ter·dig·i·ta·tion/-"dij-&-'tA-sh&n/noun