(transitive) To ground (an opinion, a conclusion, etc) on. / (transitive) To derive (a work) from.

(baseball) Having reached a base in an inning. / Located within the premises of a military base. / (aviation) Flying the base leg of an approach.

Acronym of building, antenna-tower, span, earth.

plural of Bas

plural of basing

With respect to financial or other assistance, derived from need rather than earned by merit.

based on silicon; especially used of a proposed alternative biochemistry or lifeforms

(biology) Describing any form of life based on the organic biopolymers present in all forms of life on Earth.

(theology, religious studies) based on religious faith / (chiefly US, euphemistic) of civic associations connected with religious groups, specifically of such organizations sponsored by government funds

(computing, of a computing language, or expert system) based on a series of simple "if then" rules