[ moj-uh-lar-i-tee, mod-yuh- ]
/ ˌmɒdʒ əˈlær ɪ ti, ˌmɒd yə- /
the use of individually distinct functional units, as in assembling an electronic or mechanical system.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for modularity
Debugging of that unit was exceedingly laborious because of the lack of modularity in its components.On-Line Data-Acquisition Systems in Nuclear Physics, 1969|H. W. Fulbright et al.