open - noun

a clear or unobstructed space or expanse of land or water

where the air is unconfined

a tournament in which both professionals and amateurs may play

information that has become public

open - verb

• cause to open or to become open
• start to operate or function or cause to start operating or functioning
• become open
• begin or set in action, of meetings, speeches, recitals, etc.
• spread out or open from a closed or folded state
• make available
• become available
• have an opening or passage or outlet
• make the opening move
• afford access to
• display the contents of a file or start an application as on a computer

open - adjective

• affording unobstructed entrance and exit; not shut or closed
• affording free passage or access
• used of mouth or eyes
• (set theory) of an interval that contains neither of its endpoints
• ready or willing to receive favorably
• open and observable; not secret or hidden
• with no protection or shield
• open to or in view of all
• not having been filled
• accessible to all
• not defended or capable of being defended
• (of textures) full of small openings or gaps
• having no protecting cover or enclosure
• not brought to a conclusion; subject to further thought
• not sealed or having been unsealed
• without undue constriction as from e.g. tenseness or inhibition
• not requiring union membership
• possibly accepting or permitting
• affording free passage or view
• openly straightforward and direct without reserve or secretiveness
• ready for business

open - thesaurus

afford   assailable   candid   capable   clear   exposed   give   loose   opened   outdoors   overt   receptive   spread   subject   surface   undecided   undefendable   undefended   undetermined   unfastened   unfold   unresolved