reserved

1. Set aside for the use of a particular person or party (synset 301995406)
   similar to:

   • booked, engaged, set-aside - reserved in advance
   • bookable - subject to being reserved or booked
2. Marked by self-restraint and reticence (synset 301994423)
   "was habitually reserved in speech, withholding her opinion"
   also:

   • backward - (used of temperament or behavior) marked by a retiring nature
   • undemonstrative - not given to open expression of emotion
   • inhibited - held back or restrained or prevented
   • restrained - under restraint
   similar to:

   • aloof, distant, upstage - remote in manner
   • diffident - showing modest reserve
   • indrawn, withdrawn - tending to reserve or introspection

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