1. into or in one gathering, company, mass, place, or body.
2. into or in union, proximity, contact, or collision, as two or more things.
3. into or in relationship, association, business, or agreement, etc., as two or more persons.
4. taken or considered collectively or conjointly.
5. (of a single thing) into or in a condition of unity, compactness, or coherence.
Etymology: late Middle English, variant of earlier togedere, togadere, Old English tōgædere; cognate with Old Frisian togadera.