I. ˈ ̷ ̷ˌ ̷ ̷ adjective
Etymology: from the phrase walk in
1.
a. : large enough to be walked into
walk-in closet
walk-in refrigerator
b. : arranged so as to be entered directly rather than through a lobby
walk-in apartment
2. : being a person that walks in
for treating walk-in neurotics rather than locked-in psychotics — Time
: of or connected with persons that walk in
sales are attributed to walk-in trade, rather than to any particular promotion — Retailing Daily
II. noun
( -s )
1. : a walk-in refrigerator or cold storage room
2. : an easy election victory
III. adjective
: being or offering a sevice provided to people who walk in without an appointment or reservation
a walk-in medical clinic
also : being a person who uses such a service
IV. noun
: a person who walks in without an appointment or reservation