extens.o VPAR 3 1 DAT S M PERF PASSIVE PPL
extens.o VPAR 3 1 DAT S N PERF PASSIVE PPL
extens.o VPAR 3 1 ABL S M PERF PASSIVE PPL
extens.o VPAR 3 1 ABL S N PERF PASSIVE PPL
extendo, extendere, extendi, extensus V (3rd) TRANS [XXXAO]
stretch/thrust out; make taut; extend/prolong/continue; enlarge/increase;
make even/straight/smooth; stretch out in death, (PASS) lie full length;
extens.o ADJ 1 1 DAT S M POS
extens.o ADJ 1 1 DAT S N POS
extens.o ADJ 1 1 ABL S M POS
extens.o ADJ 1 1 ABL S N POS
extensus, extensa, extensum ADJ [XXXFX] veryrare
lengthened (vowel); wide, extended, extensive (L+S); prolonged, drawn out;

Credits:
This, our local install of the popular standby Whitaker's Words, is possible thanks to the resurrection of the venerable project at William Whitaker's Words, where you will also find extensive documentation. The corresponding GitHub repository is where you can submit issues about missing forms and analyses.
This web interface by Walter M. Shandruk.