DIFFUSIVE, adjective Having the quality of diffusing, or spreading by flowing, as liquid substances or fluids; or of dispersing, as minute particles. Water, air and light; dust, smoke and odors, are diffusive substances. 2. Extended; spread widely; extending in all directions; extensive; as diffusive charity or benevolence.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI