Synonyms for open

modified

1. Not closed

   unclosed, accessible, clear, open to view, uncovered, disclosed, divulged, introduced, initiated, inaugurated, begun, full-blown, unfurled, susceptible, ajar, agape, gaping, yawning, wide, rent, torn, spacious, broad gauge, unshut, expansive, extensive, spread out, vistaed, revealed, unenclosed; see also senses 2, 4.

   Antonyms tight*, closed, shut.

2. Not obstructed

   unlocked, unbarred, unbolted, unlatched, unblocked, unfastened, cleared, removed, made passable, unsealed, unobstructed, unoccupied, vacated, unburdened, emptied; see also sense 1.

   Antonyms taken*, barred, blocked.

3. Not forbidden

   free, unrestricted, permitted, allowable, free of access, public, welcoming, not posted; see also admissible, permitted.

   Antonyms refused*, restricted, forbidden.

4. Not protected

   unguarded, unsecluded, liable, exposed, out in the weather, uncovered, apart, fallen open, unshut, unroofed, insecure, unsafe, conspicuous, unhidden, unconcealed, subject, sensitive; see also sense 1, unsafe.

   Antonyms safe*, secluded, secure.

5. Not decided

   in question, up for discussion, debatable; see controversial, questionable 1, uncertain 2.

6. Not solid

   airy, fretted, fretworked, openworked, intersticed, filigree; see also penetrable.

   Antonyms firm*, solid, impenetrable.

7. Frank

   plain, candid, straightforward; see frank.

8. Obvious

   apparent, well-known, clear; see obvious 1. See syn. study at frank.

verb

1. To begin

   start, inaugurate, initiate; see begin 1, 2.

2. To move aside a prepared obstruction

   unbar, unlock, unclose, clear, admit, turn back, reopen, open the lock, lift the latch, free, loosen, disengage, throw open, lay open, swing wide, unfasten, undo, unbolt, throw back the bolt, turn the key, turn the knob.

   Antonyms close*, shut, lock.

3. To make an opening

   force an entrance, breach, make an aperture, cut in, tear down, push in, shatter, destroy, burst in, break open, cave in, burst out from, penetrate, cleave, pierce, force one's way into, smash, prick, punch a hole into, slit, puncture, crack, muscle in*, jimmy*; see also force 2, remove 1.

   Antonyms repair*, seal, mend.

4. To make available

   make accessible, put on sale, put on view, open to the public, make public, put forward, free, make obtainable, make usable, prepare, present, make convenient, make ready.

   Antonyms remove*, put away, lock up.

5. To begin business

   open for business, hang out one's shingle, receive business, go into business, set up shop, get to work.

6. To expose to fuller view

   unroll, unfold, uncover; see expose 1, reveal 1.