What does basing mean?
"Basing" is the present participle and gerund of the verb "to base," and it captures two closely related ideas: grounding and establishing. In its most common use, basing means taking something—evidence, data, a belief, or prior work—as the foundation for a judgment, decision, or creation, as in "basing her conclusions on ten years of clinical trials." It nearly always appears with the preposition "on" in this sense, reflecting the underlying metaphor of ideas resting on foundations. In its second sense, basing refers to setting up a person, organization, military unit, or business operation in a particular location that serves as its center of activity, as in "basing the fleet at Portsmouth." The word derives from Latin "basis," meaning a foundation or pedestal, which entered English via French and Greek. Neutral and versatile, basing belongs firmly to formal and professional registers—journalism, law, academia, and business—where precision about what supports a claim matters. It is a small word doing heavy structural work in English argumentation.
To found, ground, or justify something on a particular source, principle, or set of facts.
"Basing his forecast on last quarter's sales figures, he predicted steady growth."
Requires the preposition 'on': one bases something on something else.
To establish or station a person, organization, or operation in a place that serves as its main center of activity.
"The airline is basing two additional aircraft at Manchester airport next spring."
Every time you say 'based on' you're using the same Latin root that gives us 'basis' — basing is simply that ancient foundation metaphor caught in motion.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of basing
Basing derives from the verb "base," which comes from the noun "base" meaning a foundation or lowest part. That noun traces back through Old French "bas" and Latin "basis" to Greek "basis" (βάσις), meaning a step, pedestal, or foundation, ultimately from the Greek verb "baínein," to go or step. The verb "base" in the sense of grounding something on a support developed in English around the mid-18th century, while the sense of establishing an operational center arose later, particularly in military and commercial contexts. Cognates from the same Greek root include "basis," "basic," "basement," and "debase." The spelling change from Greek "basis" to English "base" reflects transmission through Latin and French.
Related word forms
How basing is actually used
Almost always used transitively and followed by 'on' when it means grounding an idea or decision ('basing X on Y'); when it means establishing an operational center, it typically takes a place as the object. Common in journalism, business writing, and academic prose; neutral in register. Note the grammatical pattern: one bases something on something else, not 'bases something off of' in formal usage.
Easily confused with basing
Basting means moistening food during cooking or sewing with loose temporary stitches, whereas basing means founding or grounding something on a base.